Cappuccino (, ; from German ) is an espresso-based coffee drink traditionally prepared with steamed milk, including a layer of milk foam. Variations of the drink involve the use of cream instead of m
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e23526d86f55ef9802e55271114fd44d63328b789ea479b4fdccb5c5a0ddb8. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd3ba229-7cdf-46f4-a9db-4de17a445737.json and https://artists.proofprofile.net/proofs/artist/cd3ba229-7cdf-46f4-a9db-4de17a445737.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).