A client was just asking me about this, how to make sure the nft and physical artwork pair stick together. There's no way.
Discussion
There's one thing you're taking for granted, though: trust.
NFTs require us to trust that the thing it certifies is real. No tangible good can be virtualized (though the film "TRON" comes to mind :laughing:). NFTs are **not** virtualized tangible goods; they're just claims that something exists, and that it's owned by someone. The map is not the territory.

The only "physical" thing that can be legitimately "virtualized" is pure energy, which Bitcoin does by using cryptography to prove mathematically that real work was done. Bitcoin thus eliminates the need for us to trust, since we can verify the math ourselves.