thumb|200px|Fabio Pignatelli Fabio Pignatelli is an Italian musician. He is the bass guitar player for the Italian progressive rock band Goblin. Goblin provided soundtracks for several horror films,
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 0xd7382aae41963dab711cabf05402e60e6829966fa2f0e103689fc6dcc66075df. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaf83481-0c86-444c-b93f-b531bdeee9a2.json and https://artists.proofprofile.net/proofs/artist/eaf83481-0c86-444c-b93f-b531bdeee9a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).