The NFT itself can't be forged, but surely the artwork itself can be forged? How would the NFT identify the forgery from the original if the current owner is saying the forgery is the real one?
An NFT can contain a secret that the buyer can unlock. Presumably a pgp key or similar token. True owner transfers it to a seller upon sale. This could establish and verify provenance.
How does the key or token distinguish the original from the forgery?
don't have the answers on that one, but i would imagine it would come with a shift in how stuff is currently done.