Obligatory rather funny If NFTs Were Honest | Honest Ads https://www.youtube.com/watch?v=sG_v4bb2e4k which sets this out, a year ago

I know i’m really late to the party, but this video gave me an idea how blockchains could actually be useful for art. Not to sign a digital image to your name, that’s bullshit. But to link an actual piece of art to you as a certificate of ownership. So in case it gets stolen, you can prove you’re the real owner. This requires first time entries to be verified by certified experts, but after that you’re good to go. You would need to solve a bunch of problems, like what happens when someone dies and the objects are inherited, or what if you buy it, but the owner doesn’t update the chain or makes a mistake, etc. You would probably need a group of mods/experts who can amend the entries. But then you could more easily contact the owner, manage reproduction rights and in general make art theft less attractive, because all art dealers can easily check the current state.