Proof of reserve
Every CardNFT points at exactly one slab through a public backing key, and a redeemed slab's key is retired forever. The reconciler reads every token from the chain and checks it against what each custodian reports holding.
Every CardNFT points at exactly one slab through a public backing key, and a redeemed slab's key is retired forever. The reconciler reads every token from the chain and checks it against what each custodian reports holding.