Piergiorgio Farina (25 April 1933 – 28 July 2008) was an Italian jazz violinist, composer and singer. Career Born Piergiorgio Farinelli in Goro, Ferrara, Farina was the cousin of the singer Milva.
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 0xbaa937fea08cf512149ba7db365b9456f93b092aaadfd16c75825f7cd01394a7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ab74dd2-068b-4f74-957a-8ce507c268f5.json and https://artists.proofprofile.net/proofs/artist/4ab74dd2-068b-4f74-957a-8ce507c268f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piergiorgio Farina e il suo magico violino