thumb|right|Philippe Hersant Philippe Hersant (; born 21 June 1948 in Rome) is a French composer. He studied at the Conservatoire de Paris.Revue des deux mondes 2001 p73 "Compositeur né en 1948, prod
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 0x84c0b5688c6b02c01c49b484a6e46836488ed30515089001cff1c4dd4e7d9b4e. Chain 2 (Bitcoin): anchored in block 953841 (2026-06-15T22:20:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00044e09-459e-4075-839f-3daf55623522.json and https://artists.proofprofile.net/proofs/artist/00044e09-459e-4075-839f-3daf55623522.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hersant: Poèmes chinois: No. 5, Papillon de nuit
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 0x3e782bc5af65b0d51f52e7bcd39cab2b7946ddcd11c5c14f46f52c40ac168182. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC0302549.
Philippe Hersant: Musique à un, deux ou trois
Un animal des animaux (Bande originale du film de Nicolas Philibert)
La ville Louvre (A Film By Nicolas Philibert - The Director of Être et Avoir)
Etre et avoir (Bande originale du film de Nicolas Philibert)
Philippe Hersant: Fantaisie sur le nom de Sacher: VIII.
Hersant: L’ombre d'un doute: II. La Messagère
La messagère: XVII-XXIe siècles, un portrait de la viole de gambe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde68200702adf971b94f5d8f4f314ceede91329efcb59fa9eb3d973ccd23cb78. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR50X2407007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b97238e68ecc00812d0ddf759db68da1d3f6119c9378043c8953e82e45bb2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X2407009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2607fc8c00ec8f1623b7f8a3fa79679ec50f77ce542cd107a5fb65c25328cbf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR50X2407025.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e24f3baafa330d3561e4c605ca41a54797baeff8445825a2b2cfad12007e805. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR50X2407016.
L’ombre d'un doute: IV. La Harpe d'Orphée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16073b1728d40206a16fa3bf01c80b22b2f4ec7ffddb70785f2588d8bbf4ee7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR50X2407018.