[Jtsummers]

What can you do with the proof of ownership of a digital asset if everyone else can copy it and ignore that proof of ownership? It's like starting with DRM and saying, "Oh yeah, we don't encrypt it, we just trust you not to violate our terms. Now pay up."

[nlarew]

What would Taylor Swift do right now? I can rip all of her audio off of Spotify and use it in my movie without her permission even though she owns the music.

She would try to stop me - maybe send a cease and desist, sue, or otherwise seek remuneration for unauthorized use of her work.

Her proof of ownership is a signed contract with her recording company and any US copyright filings.

Your proof of ownership is an unambiguous cryptographic scheme (NFT), which you could use to secure a US copyright.