diff --git a/LICENSE b/LICENSE
index 0ea3ff8..3ac8ab6 100644
--- a/LICENSE
+++ b/LICENSE
@@ -176,6 +176,7 @@
 
    END OF TERMS AND CONDITIONS
 
+   Copyright 2019, 2020 OCI Contributors
    Copyright 2016 Docker, Inc.
 
    Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/README.md b/README.md
index 4b2b261..a112872 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,7 @@ If you find an issue, please follow the [security][security] protocol to report
 
 # Copyright and license
 
+Copyright © 2019, 2020 OCI Contributors
 Copyright © 2016 Docker, Inc.
 All rights reserved, except as follows.
 Code is released under the [Apache 2.0 license](LICENSE).
diff --git a/algorithm.go b/algorithm.go
index 8813bd2..490951d 100644
--- a/algorithm.go
+++ b/algorithm.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/algorithm_test.go b/algorithm_test.go
index d50e849..192e058 100644
--- a/algorithm_test.go
+++ b/algorithm_test.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/digest.go b/digest.go
index ad398cb..518b5e7 100644
--- a/digest.go
+++ b/digest.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/digest_test.go b/digest_test.go
index cc3b648..d098385 100644
--- a/digest_test.go
+++ b/digest_test.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/digester.go b/digester.go
index 36fa272..ede9077 100644
--- a/digester.go
+++ b/digester.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/doc.go b/doc.go
index 854a995..83d3a93 100644
--- a/doc.go
+++ b/doc.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/verifiers.go b/verifiers.go
index 32125e9..afef506 100644
--- a/verifiers.go
+++ b/verifiers.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/verifiers_test.go b/verifiers_test.go
index d67bb1b..0e35115 100644
--- a/verifiers_test.go
+++ b/verifiers_test.go
@@ -1,3 +1,4 @@
+// Copyright 2019, 2020 OCI Contributors
 // Copyright 2017 Docker, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");