I thought we were talking about the problem of someone pulling the rug out from under you by changing the content at a URL. The hash solves the problem, but what you are talking about is an entirely different subject, and a problem which all NFTs suffer. Or not a problem, but just a general property of NFTs and crypto as well. The network effect is extremely important with blockchains. You could also fork BTC right now and claim you own everything on the chain. Doesn't mean people will honor it.
A hash doesn't really solve the core of the rug pull problem. If the hash doesn't match you know the file at that URL changed, but how was it changed? Was it just a metadata that didn't really change the artwork, or is it a totally different file?
And what does it mean for the transaction on the block chain if both the URL and the hash no longer match? Is it worthless now and unsellable? Or do you sell it with a note that says ignore the URL, ignore the hash, or both?
I did point out other issues and that may have been unnecessary, but a hash doesn't solve the rug pull problem if the art isn't part of the encrypted and (mostly) immutable transaction block.
Not really. The hash would prevent someone to pull the rug unnoticed, but it wouldn't prevent rug pulling in the first place.
With a hash, you would be able to prove that what's currently at that url isn't what you bought, but (since hashes are by definition non-reversible) you wouldn't be able to show or see what it was you bought (unless you stored it somewhere else yourself).
