diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..c54816f
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,15 @@
+Docker attest
+Copyright Docker attest authors
+
+This product includes software developed at Docker, Inc. (https://www.docker.com).
+
+The following is courtesy of our legal counsel:
+
+Use and transfer of Docker may be subject to certain restrictions by the
+United States and other governments.
+It is your responsibility to ensure that your use and/or transfer does not
+violate applicable laws.
+
+For more information, please see https://www.bis.doc.gov
+
+See also https://www.apache.org/dev/crypto.html and/or seek legal counsel.
diff --git a/attestation/attestation.go b/attestation/attestation.go
index 7f040cf..1513ba1 100644
--- a/attestation/attestation.go
+++ b/attestation/attestation.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/attestation_test.go b/attestation/attestation_test.go
index 362b3ab..c35d029 100644
--- a/attestation/attestation_test.go
+++ b/attestation/attestation_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/example_attestation_manifest_test.go b/attestation/example_attestation_manifest_test.go
index a8e0ece..a96b855 100644
--- a/attestation/example_attestation_manifest_test.go
+++ b/attestation/example_attestation_manifest_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/layout.go b/attestation/layout.go
index 94a72f3..4572458 100644
--- a/attestation/layout.go
+++ b/attestation/layout.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/layout_test.go b/attestation/layout_test.go
index 4be30fe..a7e6273 100644
--- a/attestation/layout_test.go
+++ b/attestation/layout_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/mock.go b/attestation/mock.go
index 98dacc9..47f6cf6 100644
--- a/attestation/mock.go
+++ b/attestation/mock.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/referrers.go b/attestation/referrers.go
index 4c109ed..573d2e6 100644
--- a/attestation/referrers.go
+++ b/attestation/referrers.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/referrers_test.go b/attestation/referrers_test.go
index c54d919..0b47109 100644
--- a/attestation/referrers_test.go
+++ b/attestation/referrers_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/registry.go b/attestation/registry.go
index 73639d3..74b7b3b 100644
--- a/attestation/registry.go
+++ b/attestation/registry.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/registry_test.go b/attestation/registry_test.go
index dbcb128..10853d8 100644
--- a/attestation/registry_test.go
+++ b/attestation/registry_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/resolver.go b/attestation/resolver.go
index 7eae516..6d2172f 100644
--- a/attestation/resolver.go
+++ b/attestation/resolver.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/sign.go b/attestation/sign.go
index 55eea11..e14d7c3 100644
--- a/attestation/sign.go
+++ b/attestation/sign.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/sign_test.go b/attestation/sign_test.go
index 690998f..16711ad 100644
--- a/attestation/sign_test.go
+++ b/attestation/sign_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/types.go b/attestation/types.go
index 043312d..53eed0a 100644
--- a/attestation/types.go
+++ b/attestation/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/types_test.go b/attestation/types_test.go
index 3de793e..5dfb6fe 100644
--- a/attestation/types_test.go
+++ b/attestation/types_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/verifier.go b/attestation/verifier.go
index 482aefa..acfb910 100644
--- a/attestation/verifier.go
+++ b/attestation/verifier.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/verifier_test.go b/attestation/verifier_test.go
index d2b6d1e..5ef285c 100644
--- a/attestation/verifier_test.go
+++ b/attestation/verifier_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/verify.go b/attestation/verify.go
index fbd47d6..c8d947b 100644
--- a/attestation/verify.go
+++ b/attestation/verify.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/attestation/verify_test.go b/attestation/verify_test.go
index 0e3f0fc..c9db59a 100644
--- a/attestation/verify_test.go
+++ b/attestation/verify_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation_test
 
 import (
diff --git a/attestation/vsa.go b/attestation/vsa.go
index d334d03..5faa19a 100644
--- a/attestation/vsa.go
+++ b/attestation/vsa.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attestation
 
 import (
diff --git a/example_sign_test.go b/example_sign_test.go
index 97ab9a7..1f6d6c3 100644
--- a/example_sign_test.go
+++ b/example_sign_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest_test
 
 import (
diff --git a/example_verify_test.go b/example_verify_test.go
index b91deee..d228ed4 100644
--- a/example_verify_test.go
+++ b/example_verify_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest_test
 
 import (
diff --git a/internal/embed/root.go b/internal/embed/root.go
index 9bf20ae..680ccc1 100644
--- a/internal/embed/root.go
+++ b/internal/embed/root.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package embed
 
 import (
diff --git a/internal/test/test.go b/internal/test/test.go
index dbc2cbf..a760f19 100644
--- a/internal/test/test.go
+++ b/internal/test/test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package test
 
 import (
diff --git a/internal/util/crypto.go b/internal/util/crypto.go
index f28d63a..e7d90b3 100644
--- a/internal/util/crypto.go
+++ b/internal/util/crypto.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package util
 
 import (
diff --git a/mapping/mapping.go b/mapping/mapping.go
index 342454a..8c9ea28 100644
--- a/mapping/mapping.go
+++ b/mapping/mapping.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mapping
 
 import (
diff --git a/mapping/mapping_test.go b/mapping/mapping_test.go
index 06d4a94..8cd4540 100644
--- a/mapping/mapping_test.go
+++ b/mapping/mapping_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mapping
 
 import (
diff --git a/mapping/match.go b/mapping/match.go
index cfac8b6..755bd48 100644
--- a/mapping/match.go
+++ b/mapping/match.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mapping
 
 import (
diff --git a/mapping/match_test.go b/mapping/match_test.go
index 31f0c61..6d0a89a 100644
--- a/mapping/match_test.go
+++ b/mapping/match_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mapping
 
 import (
diff --git a/mapping/types.go b/mapping/types.go
index 96192e3..9a919b3 100644
--- a/mapping/types.go
+++ b/mapping/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mapping
 
 import (
diff --git a/mirror/example_mirror_test.go b/mirror/example_mirror_test.go
index 51ca46d..a3f61d0 100644
--- a/mirror/example_mirror_test.go
+++ b/mirror/example_mirror_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror_test
 
 import (
diff --git a/mirror/metadata.go b/mirror/metadata.go
index fc49948..9f501fd 100644
--- a/mirror/metadata.go
+++ b/mirror/metadata.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/mirror/metadata_test.go b/mirror/metadata_test.go
index fed45d3..d1af5aa 100644
--- a/mirror/metadata_test.go
+++ b/mirror/metadata_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/mirror/mirror.go b/mirror/mirror.go
index 5cb3cff..4a85627 100644
--- a/mirror/mirror.go
+++ b/mirror/mirror.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/mirror/targets.go b/mirror/targets.go
index f189579..ac2182f 100644
--- a/mirror/targets.go
+++ b/mirror/targets.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/mirror/targets_test.go b/mirror/targets_test.go
index 22dc7d2..c21bd50 100644
--- a/mirror/targets_test.go
+++ b/mirror/targets_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/mirror/types.go b/mirror/types.go
index 865c17f..a20d0af 100644
--- a/mirror/types.go
+++ b/mirror/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package mirror
 
 import (
diff --git a/oci/authn.go b/oci/authn.go
index 98452a0..91da425 100644
--- a/oci/authn.go
+++ b/oci/authn.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/authn_test.go b/oci/authn_test.go
index e415d7a..fcfbd33 100644
--- a/oci/authn_test.go
+++ b/oci/authn_test.go
@@ -1,5 +1,21 @@
 //go:build e2e
 
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci_test
 
 import (
diff --git a/oci/oci.go b/oci/oci.go
index 85183fc..bafd738 100644
--- a/oci/oci.go
+++ b/oci/oci.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/oci_test.go b/oci/oci_test.go
index 65766d7..4b275bd 100644
--- a/oci/oci_test.go
+++ b/oci/oci_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci_test
 
 import (
diff --git a/oci/output.go b/oci/output.go
index 66399eb..091fb56 100644
--- a/oci/output.go
+++ b/oci/output.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/output_test.go b/oci/output_test.go
index e313836..f971f83 100644
--- a/oci/output_test.go
+++ b/oci/output_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci_test
 
 import (
diff --git a/oci/registry.go b/oci/registry.go
index b461b4b..3c6fb11 100644
--- a/oci/registry.go
+++ b/oci/registry.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/resolver.go b/oci/resolver.go
index a5aaae5..3ad1220 100644
--- a/oci/resolver.go
+++ b/oci/resolver.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/types.go b/oci/types.go
index 78e6f62..8750673 100644
--- a/oci/types.go
+++ b/oci/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/oci/types_test.go b/oci/types_test.go
index 704fdd9..9d39820 100644
--- a/oci/types_test.go
+++ b/oci/types_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package oci
 
 import (
diff --git a/policy/evaluator.go b/policy/evaluator.go
index 4e28c37..2ec2861 100644
--- a/policy/evaluator.go
+++ b/policy/evaluator.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/mock.go b/policy/mock.go
index bacd5ff..a11f069 100644
--- a/policy/mock.go
+++ b/policy/mock.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/policy.go b/policy/policy.go
index d63ab6a..1051b9e 100644
--- a/policy/policy.go
+++ b/policy/policy.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/policy_test.go b/policy/policy_test.go
index c2d43c6..7d1b6c2 100644
--- a/policy/policy_test.go
+++ b/policy/policy_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy_test
 
 import (
diff --git a/policy/rego.go b/policy/rego.go
index ca4b8f9..39c3867 100644
--- a/policy/rego.go
+++ b/policy/rego.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/rego_test.go b/policy/rego_test.go
index 5f44083..a66198c 100644
--- a/policy/rego_test.go
+++ b/policy/rego_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/resolver.go b/policy/resolver.go
index 66cfb47..61694b6 100644
--- a/policy/resolver.go
+++ b/policy/resolver.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/policy/resolver_test.go b/policy/resolver_test.go
index 36412c5..9d34d34 100644
--- a/policy/resolver_test.go
+++ b/policy/resolver_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy_test
 
 import (
diff --git a/policy/types.go b/policy/types.go
index a14e56a..ff92fd0 100644
--- a/policy/types.go
+++ b/policy/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package policy
 
 import (
diff --git a/scripts/gen-testdata.sh b/scripts/gen-testdata.sh
index 47621af..97c8acf 100755
--- a/scripts/gen-testdata.sh
+++ b/scripts/gen-testdata.sh
@@ -1,4 +1,19 @@
 #!/bin/bash
+
+#   Copyright Docker attest authors
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
 set -eo pipefail
 
 echo "Starting the process to generate testdata..."
diff --git a/sign.go b/sign.go
index 832cca2..cd96114 100644
--- a/sign.go
+++ b/sign.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest
 
 import (
diff --git a/sign_test.go b/sign_test.go
index 14c1e6a..3535aba 100644
--- a/sign_test.go
+++ b/sign_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest
 
 import (
diff --git a/signerverifier/aws.go b/signerverifier/aws.go
index a61568c..0bd295d 100644
--- a/signerverifier/aws.go
+++ b/signerverifier/aws.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/common.go b/signerverifier/common.go
index 0747460..414e0c6 100644
--- a/signerverifier/common.go
+++ b/signerverifier/common.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/ecdsa.go b/signerverifier/ecdsa.go
index 18bf9c7..b48e6b9 100644
--- a/signerverifier/ecdsa.go
+++ b/signerverifier/ecdsa.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/gcp.go b/signerverifier/gcp.go
index 0768451..e6c624d 100644
--- a/signerverifier/gcp.go
+++ b/signerverifier/gcp.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/gcp_test.go b/signerverifier/gcp_test.go
index e603ab9..a6a74b4 100644
--- a/signerverifier/gcp_test.go
+++ b/signerverifier/gcp_test.go
@@ -1,5 +1,21 @@
 //go:build e2e
 
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/keyid.go b/signerverifier/keyid.go
index f709f7d..f1cd31e 100644
--- a/signerverifier/keyid.go
+++ b/signerverifier/keyid.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/signerverifier/parse.go b/signerverifier/parse.go
index 93e042e..e30414e 100644
--- a/signerverifier/parse.go
+++ b/signerverifier/parse.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package signerverifier
 
 import (
diff --git a/template/bash.txt b/template/bash.txt
new file mode 100644
index 0000000..235dda9
--- /dev/null
+++ b/template/bash.txt
@@ -0,0 +1,13 @@
+#   Copyright Docker attest authors
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
diff --git a/template/dockerfile.txt b/template/dockerfile.txt
new file mode 100644
index 0000000..6efc090
--- /dev/null
+++ b/template/dockerfile.txt
@@ -0,0 +1,13 @@
+#   Copyright Docker attest authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
diff --git a/template/go.txt b/template/go.txt
new file mode 100644
index 0000000..5d8ba3a
--- /dev/null
+++ b/template/go.txt
@@ -0,0 +1,16 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
diff --git a/template/makefile.txt b/template/makefile.txt
new file mode 100644
index 0000000..6efc090
--- /dev/null
+++ b/template/makefile.txt
@@ -0,0 +1,13 @@
+#   Copyright Docker attest authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
diff --git a/test/Dockerfile b/test/Dockerfile
index 274a7c6..c25b19d 100644
--- a/test/Dockerfile
+++ b/test/Dockerfile
@@ -1,3 +1,16 @@
+#   Copyright Docker attest authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
 FROM alpine AS build
 RUN echo "hello world" > /tmp/hello.txt
 
diff --git a/tlog/mock.go b/tlog/mock.go
index 9126718..7bfadd8 100644
--- a/tlog/mock.go
+++ b/tlog/mock.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tlog
 
 import (
diff --git a/tlog/rekor.go b/tlog/rekor.go
index 2ae536b..c7a2b5d 100644
--- a/tlog/rekor.go
+++ b/tlog/rekor.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tlog
 
 import (
diff --git a/tlog/rekor_test.go b/tlog/rekor_test.go
index 50ef0bb..b7263c1 100644
--- a/tlog/rekor_test.go
+++ b/tlog/rekor_test.go
@@ -1,5 +1,21 @@
 //go:build e2e
 
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tlog
 
 import (
diff --git a/tlog/tl.go b/tlog/tl.go
index 46a2dc7..eb89c4d 100644
--- a/tlog/tl.go
+++ b/tlog/tl.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tlog
 
 import (
diff --git a/tlog/tl_test.go b/tlog/tl_test.go
index 15f9412..c247038 100644
--- a/tlog/tl_test.go
+++ b/tlog/tl_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tlog
 
 import (
diff --git a/tuf/example_registry_test.go b/tuf/example_registry_test.go
index d67880b..51c9a31 100644
--- a/tuf/example_registry_test.go
+++ b/tuf/example_registry_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf_test
 
 import (
diff --git a/tuf/mock.go b/tuf/mock.go
index f024535..1df2ede 100644
--- a/tuf/mock.go
+++ b/tuf/mock.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/registry.go b/tuf/registry.go
index c59593f..5157628 100644
--- a/tuf/registry.go
+++ b/tuf/registry.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/registry_test.go b/tuf/registry_test.go
index f7b4094..a77b5b0 100644
--- a/tuf/registry_test.go
+++ b/tuf/registry_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/tuf.go b/tuf/tuf.go
index e54911c..003662b 100644
--- a/tuf/tuf.go
+++ b/tuf/tuf.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/tuf_test.go b/tuf/tuf_test.go
index 9edb784..65b578b 100644
--- a/tuf/tuf_test.go
+++ b/tuf/tuf_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/version.go b/tuf/version.go
index 671cf5b..3e1eb62 100644
--- a/tuf/version.go
+++ b/tuf/version.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/tuf/version_test.go b/tuf/version_test.go
index 46c21bd..2a46a53 100644
--- a/tuf/version_test.go
+++ b/tuf/version_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package tuf
 
 import (
diff --git a/types.go b/types.go
index 3824208..4fe30d4 100644
--- a/types.go
+++ b/types.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest
 
 import (
diff --git a/useragent/useragent.go b/useragent/useragent.go
index f551f4a..db2e74a 100644
--- a/useragent/useragent.go
+++ b/useragent/useragent.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package useragent
 
 import (
diff --git a/useragent/useragent_test.go b/useragent/useragent_test.go
index 3cc8d92..3f921b7 100644
--- a/useragent/useragent_test.go
+++ b/useragent/useragent_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package useragent
 
 import (
diff --git a/verify.go b/verify.go
index ac2c0d6..74d54bd 100644
--- a/verify.go
+++ b/verify.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest
 
 import (
diff --git a/verify_test.go b/verify_test.go
index ff51fd5..0f12f49 100644
--- a/verify_test.go
+++ b/verify_test.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package attest
 
 import (
diff --git a/version/version.go b/version/version.go
index 166dcaa..c882190 100644
--- a/version/version.go
+++ b/version/version.go
@@ -1,3 +1,19 @@
+/*
+   Copyright Docker attest authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package version
 
 import (