Appreciate your comment and upvote! My understanding is that the difference between these NFTs and the tradtional L2 Hive NFTs is that these doesn't require centralized databases/smart contracts. The blogpost link below has more info from the creator of the solution, including a link to the API documentation. I'll tag @simplegame here as well, perhaps he'd like to provide further info.

Also feel free to check out the other info-clip I made the other day that sort of addresses your question too: