TLDR:Docker Content Trust (DCT) and the Notary v1 service at
notary.docker.io are being fully retired (first announced inJuly of 2025).This blog explains
what is changing, who is affected, and how to move to modern
alternatives. Ten years ago, Docker Content Trust (DCT)
gave the container ecosystem one of its first ways to verify the
integrity and publisher of an image, built on The Update Framework
and the Notary v1 project.The upstream Notary v1 codebase is no
longer maintained, more modern signing tools
TLDR:Docker Content Trust (DCT) and the Notary v1 service at
notary.docker.io are being fully retired (first announced in
July of 2025).This blog explains
what is changing, who is affected, and how to move to modern
alternatives. Ten years ago, Docker Content Trust (DCT)
gave the container ecosystem one of its first ways to verify the
integrity and publisher of an image, built on The Update Framework
and the Notary v1 project.The upstream Notary v1 codebase is no
longer maintained, more modern signing tools