Bruno Coulais (born 13 January 1954) is a French composer, most widely known for his music on film soundtracks. Life and career Coulais was born in Paris; his father, Farth Coulais, is from Vendée,
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 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 0x68ccebb1e7a18f1050006f965c83a81e2a2fa302b65718e4ccbf23873efd18bd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3781e6bf-4e4d-4c69-aa56-7ccf5073104b.json and https://artists.proofprofile.net/proofs/artist/3781e6bf-4e4d-4c69-aa56-7ccf5073104b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vois sur ton chemin - from "Les Choristes"
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 0xac2dfed8737a896940b3b898e813ca247d8f91a3d4b439ff7c34ac12bb04580e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12126527.
Vois sur ton chemin: Les choristes: Vois sur ton chemin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75987245f4073a4d4cb20c821595574fad09db7924273cf7cad6da34fed0175a. 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/DEA551123242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c1e6e7f5b97e2ac227268d0fbccb69c661fd9bb82e0bd0750bf2999427f42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB111700307.
Vois sur ton chemin (from "Les Choristes")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2dfed8737a896940b3b898e813ca247d8f91a3d4b439ff7c34ac12bb04580e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12126527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a54b9514720cf9ecf2441f614c91d98596117ff5a249711f3fe0b47e37c855e. 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/GBAJC0500392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a54b9514720cf9ecf2441f614c91d98596117ff5a249711f3fe0b47e37c855e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAJC0500392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fdfe1dc3c73e46e3422ca526a700c0abdf24288cc3b5439faacbff8e166880. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEE861300752.
Die Kinder des Monsieur Mathieu. Lieder aus dem Film »Les choristes« und weitere Lieder für Kinderchor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a22c117b681ec3ceb288ea349d2dc7a4157ee3e560f4a32be0f618e9c46d21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB111102303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21685956c51ba42b8e4322f732976f3ac2f0bea879d1e80bcabbf77e7b9f864b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB111102319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b3af226c3e0e86cba45ed0b964fd8d47d69b63fc09f5048a9b76c660035edd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB111102321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5963dd6e548d4774a6c4e75d1c058b8e1f572d9bd5746b9367ee3edce5654aed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB111102324.
Voyage à travers le cinéma français - Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95cb3d0a069dba408b2eb69173d6aa74a535bc0b3485ef6fb378e40c1a001f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR48W1600001.