thumb|upright| Jean-Pierre Guignon, né Giovanni Pietro Ghignone (10 February 1702 – 30 January 1774) was an 18th-century Franco-Italian composer and violinist. Life Born in Turin, Guignon was the
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 0x79d2a9cf9b54b9c2b8cf47d33240f98c3ee7a40e82bffc8d664aca9d513f119d. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28648df6-7fa8-452c-aef9-87e0f7adb3b5.json and https://artists.proofprofile.net/proofs/artist/28648df6-7fa8-452c-aef9-87e0f7adb3b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jean-Pierre Guignon: Sonata in C Minor for Violin and Continuo, Op. 1 No. 9: I. Andante
Jean-Pierre Guignon: Sonata No. 2, Op. 3