Cécile Hugonnard-Roche is a French pianist and piano assistant teacher at the Conservatoire de Paris and has taught at the École normale de musique de Paris. As of 2016, Hugonnard-Roche teaches the p
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 0xc48466746456fd4f6ff38812fd6674d301dd4834e4fb53709d66f39c572ebcc7. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3629c771-7dc0-4830-b67c-674d44c85e77.json and https://artists.proofprofile.net/proofs/artist/3629c771-7dc0-4830-b67c-674d44c85e77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).