In order for an NFT to have value, the issuing entity needs to have some kind of ownership claim to the underlying asset. So if one entity sells the same underlying asset twice on two different blockchains, the buyers of those assets could come after the issuing authority in court.
why is that though? the creator of an nft can sell it anywhere and as many places as they want to. no one is going to come after them for doing that.
maybe what you meant is if a buyer of an nft tries to do that. completely different story.
The solution to the above problem is not technical, as it not technically possible to prevent someone from selling the same asset on two blockchains. The solution is legal, and is something that would need to be handled by the courts.
yeah but are they allowed to do that? anyone considering legal action will probably end up spending alot of money. but i guess that's relative. like if their nft is worth $200,000 vs $2.