Jean Doyen (8 March 1907 – 21 April 1982) was a French classical pianist, pedagogue and composer. Biography Jean Doyen was born in Paris on 8 March 1907. He graduated from the Conservatoire de Pari
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 0x8cd82dce94d76dcd244d580d6c88e0a2a5fb84a730e62dcecc426b8698792293. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49d27b4f-e237-4409-9114-3bd3e0bcb2a6.json and https://artists.proofprofile.net/proofs/artist/49d27b4f-e237-4409-9114-3bd3e0bcb2a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franck: Variations symphoniques - Fauré: Ballade, Op. 19 (Mono Version)
Saint-Saëns: Concerto pour piano No. 2 - d'Indy: Symphonie sur un chant montagnard français (Mono Version)
d'Indy: Symphonie "Cévenole" - Franck: Variations symphoniques - Fauré: Ballade pour piano et orchestre (Mono Version)
De Vincent d'Indy à Reynaldo Hahn (Mono version)
Duparc, Fauré, Schumann & Schubert : Mélodies
Ropartz: Jeunes filles: No. 5, La capricieuse
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d1da1424b0590347af4f3b950550044744a0d442b64ab640a66d6ac8f74ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ206701105.