I think graphic artists create the original art-work on a metal plate or something and then make 100 prints and then destroy the plates or at least promise neve

I think graphic artists create the original art-work on a metal plate or something and then make 100 prints and then destroy the plates or at least promise never to use them again. There is some proof of work there. Maybe part of the same idea works with NFTs as well, you must do some work to register your NFT etc. I wonder if what we need is a block-chain for the actual development of the art. Pieces of art typically don't just appear out of thin air but take many stages to develop. Those stages could be saved into a block-chain and then the whole chain could be sold.