$ oras resolve -h
Resolves digest of the target artifact

Usage:
  oras resolve [flags] <name>:<tag>

Aliases:
  digest

Flags:
      --ca-file string                              server certificate authority file for the remote registry
  -d, --debug                                       debug mode
      --descriptor                                  output a descriptor of the artifact
      --full-ref                                    print the full artifact reference with digest
  -H, --header stringArray                          add custom headers to requests
  -h, --help                                        help for resolve
      --insecure                                    allow connections to SSL registry without certs
      --media-type strings                          accepted media types
      --oci-layout                                  set target as an OCI image layout
  -p, --password string                             registry password or identity token
      --password-stdin                              read password or identity token from stdin
      --plain-http                                  allow insecure connections to registry without SSL check
      --platform os[/arch][/variant][:os_version]   request platform in the form of os[/arch][/variant][:os_version]
      --pretty                                      prettify JSON objects printed to stdout
      --registry-config path                        path of the authentication file for registry
      --resolve host:port:address[:address_port]    customized DNS for registry, formatted in host:port:address[:address_port]
  -u, --username string                             registry username
  -v, --verbose                                     verbose output

$ oras resolve docker.io/library/hello-world:latest
sha256:ffb13da98453e0f04d33a6eee5bb8e46ee50d08ebe17735fc0779d0349e889e9

$ oras resolve docker.io/library/hello-world:latest --full-ref
docker.io/library/hello-world@sha256:ffb13da98453e0f04d33a6eee5bb8e46ee50d08ebe17735fc0779d0349e889e9