This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/16.1/containerkiwi/bci/bci-busybox:16.0
  docker pull registry.opensuse.org/devel/bci/16.1/containerkiwi/bci/bci-busybox:16.0-5.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.