If you could have an offchain proof that you owned an NFT, would that be interesting?
One way to accomplish that would be to combine a proof that a block header is valid and a merkle proof linked to that header proving that your NFT is owned by your wallet. If these two proofs were small, then you could embed them in a QR code next to something physical, allowing anyone to verify ownership of the item without access to the internet. Of course, making these proofs is easy on Celo because of Plumo and hard on other chains, so this is an interesting differentiator for Celo.
Technically, this isn’t just useful for NFTs. You could prove that you hold a particular balance or that you have a certain credit rating.
What do you think? What could we build with this?