thumb|Classic Vespas in Perth, Western Australia thumb|Classic Vespa sound (43 seconds) Vespa (; Italian for 'wasp') is an Italian brand of scooters and mopeds manufactured by Piaggio. The Vespa ha
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e0f3bc985ed889ee0e30d879f388058f85aaa8b6ccfae95a0ecae2663953c. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb8bc3be-5c23-40fa-b737-89dfeefe0945.json and https://artists.proofprofile.net/proofs/artist/fb8bc3be-5c23-40fa-b737-89dfeefe0945.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).