Ask HN: Legitimacy/sensibility of digital art NFTs – authorization

Usage of NFTs (https://en.wikipedia.org/wiki/Non-fungible_token) as collectibles for digital art seems meaningful only if such NFTs are valued only when it is known that the author of the work inside the NFT has authorized the creation of this NFT.

The simple way to implement NFT authorization is to require that the NFT contains a statement signed by the author of the work that the NFT is authorized. This seems to work only when the work is well-known enough: there is a robust consensus on "who the author is", that is, the way to verify the signature; and if the work is less known, unauthorized NFTs can be created with nobody noticing.

Is there a way to certify authorization of an NFT when the work is less known and thus establishing authorship is impossible through consensus?

Also, how much commonly accepted is the described way of NFT authorization for well-known works? How much population disregards NFT authorization, and why? And I also wonder why people use NFTs at all for non-well-known works.