Yeah except you could sell the NFT on a different blockchain.

As far as NFTs are concerned, the existence of multiple incompatible blockchains is indistinguishable from what would be considered a network partition within a single blockchain for cryptocurrency.

@stagas:

> Can't they have a public personal ledger somewhere for people to audit?

Then you need to coordinate on a common authority to rely upon for the timestamping. Blockchain's whole purpose is to eliminate this dependency.