[henearkr]

To more specifically address the problem of ownership, as it is based on "declared ownership" anyway, with no real way to prevent non-owner to use the artwork (except by seeing that it is not theirs and punishing them, but then you don't need sophisticated devices for that), just embed the owner name in a copy signed (e.g. with a public RSA key) by the author, and that's it.

For transferablity, you can use the public key of a marketplace instead of the author's public key, so that the marketplace can take back the artwork (and reimburse you) and sell it again to somebody else with their new name embedded instead.

See? I can do all of that just with asymmetric ciphers.