To clarify, despite the v1 in the name, application/vnd.oci.image.manifest.v1+json is actually newer than application/vnd.docker.distribution.manifest.v2+json, not older. The latter is the older "Docker Image Manifest" format, and the former is the the newer "OCI Image Manifest" format (which was based on the older Docker format, but standardized for broader ecosystem usage back in ~2017).