thumb|Jean-François Antonioli Jean-François Antonioli (b. Lausanne, 25 February 1959) is a Swiss pianist, conductor and piano pedagogue. Studied piano at Conservatoire de Lausanne and Conservatoire d
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 0xc4a7c158c5a5d64d08823a959fa44a211ae11574a954a06c7ecf60e9847475cd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45c0d406-f72d-4275-8ba7-d529f4e7baee.json and https://artists.proofprofile.net/proofs/artist/45c0d406-f72d-4275-8ba7-d529f4e7baee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Frédéric Chopin, Johannes Brahms, Gabriel Fauré: Ballades