This container can be pulled via:
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/cosign:3
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/cosign:3.1
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/cosign:3.1.1
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/cosign:3.1.1-10.7

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.