Antonio Coggio (16 May 1939 – 19 October 2021) was an Italian composer, arranger, pianist, and record producer. After his studies at the Conservatorio Niccolò Paganini in Genoa, between 1964 and 1966
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 0xf744dfd881f7fa746413ceb2d8f5acb77ecf1ebc04d4250a9f28193e4da50e34. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a82e7afd-d46a-4226-ba39-5a4f20f3f0d1.json and https://artists.proofprofile.net/proofs/artist/a82e7afd-d46a-4226-ba39-5a4f20f3f0d1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.