1️⃣ NFT = redemption right
2️⃣ User transfers NFT → Warehouse Custody Wallet (no burn yet)
3️⃣ Custody = clear “locked” state; single source of truth
4️⃣ User pays shipping (crypto/card) – decoupled from ownership
5️⃣ NFT is burned only after delivery confirmation
6️⃣ Burn = finality: digital item gone, physical item received