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 0xc251f67e431203946f63d7109cddb6c02653b8df422a865b7c898d1a71abd98f. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd390ef1-3ab1-4ce4-8c7d-299492944b3a.json and https://artists.proofprofile.net/proofs/artist/dd390ef1-3ab1-4ce4-8c7d-299492944b3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le clavier bien tempéré, livre 1: Prélude en Do Majeur No. 1, BWV 846 (Arr. par Dimitri Naïditch)
Ma Campanella inspiré par étude S161, N3, la Campanella Paganini-Liszt
Mephistouchka inspiré par Mephisto valse N1, S514