This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/16.1/containerfile/suse/cosign:3
  docker pull registry.opensuse.org/devel/bci/16.1/containerfile/suse/cosign:3.0
  docker pull registry.opensuse.org/devel/bci/16.1/containerfile/suse/cosign:3.0.5
  docker pull registry.opensuse.org/devel/bci/16.1/containerfile/suse/cosign:3.0.5-4.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.