Jean Sulem is a French concert violist and teacher born in 1959. He has studied in the Conservatoire de Paris with Serge Collot. He has played in the "Ensemble Contemporain" directed by Pierre Boulez.
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 0x0a5576bb47cecc57608bfe0cc4ebb411197ca89062d34b7a63b99b5f1de5d4f6. 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/69bd0682-8083-4255-8b4d-4c868013dc8b.json and https://artists.proofprofile.net/proofs/artist/69bd0682-8083-4255-8b4d-4c868013dc8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).