thumb|Philippe Giusiano Philippe Giusiano (born 1973, in Marseille) is a French classical pianist. In 1990, he took part at the XII International Chopin Piano Competition, obtaining an Honourable Men
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 0x68a0d29f4d43dd3a565bbf67b72dda51d6c15dab730cabbfe7cd82a6e201bc11. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af37262a-e6bc-401f-925c-75616247cdb7.json and https://artists.proofprofile.net/proofs/artist/af37262a-e6bc-401f-925c-75616247cdb7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopin - Impromptus, Barcarolle, Scherzo No. 1 & Études op. 25
Chopin - Préludes op.28 & Sonate En Si Mineur op.58