Christophe Julien is a French composer of film and television music, largely classical, twice-nominated for César Award for best original film music. Background thumb|right|Place de la Sorbonne at th
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 0xda300da97efb98ee412b29e4db4c13bc28fb763e6854278635205698e4ea0e70. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/602785f4-c2c5-405b-9aba-39fe58d3e5fe.json and https://artists.proofprofile.net/proofs/artist/602785f4-c2c5-405b-9aba-39fe58d3e5fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Barrios Mangoré, Gismonti & Rodrigo: Terra guitarra
La Vilaine B.O. de Mélanie (Bande originale du film)
Kaboul Kitchen (Saison 2) [Bande originale de la série]
Au-Revoir Là-Haut (Original Motion Picture Soundtrack)
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 0xec3f7671a5fa9ce103f7cb68f43838399859cb8ba689bd2b7683819a1bb2780c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRR411706002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328b0f56d90d73c98d4c00c66f1758462d163511368f6fe3eee6617538e8ff34. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRR411706004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93327e4a113b1aefb9b4aee34ab4a63b8846b04121c4e41fe1ef12967f17a71d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRR411706013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4b36a3689e69ddd4d5550975f8924d9ad54a9cad595aa9be084d91d3290a03. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FRR411706014.
Au revoir là-haut (Bande originale du film d'Albert Dupontel)
Nothing to Hide (Original Motion Picture Soundtrack)
Adieu les cons (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2690f41c82dec4f5ddeffef257033b636cd03ec3c58320556d535646a1cb1f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRR412006001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419141f3d4c4c917892a5a818ba4667e331446816096c4876cf527d1f5291de4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRR412006002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171f715aded4f61c968098e89b472ad16b96d10590afcc0628a77cffaec27445. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FRR412006009.
Le sens de la famille (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d70ed1edd0d5a95b1d5de86ef882e9b0dca90e3d9fec4d5b59a41c1e76957fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR58V2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b961c3f869a22f4a0b019acac6cc955d41f70635660b50e4e89acb0a96185. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FR58V2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a0b231d74817196c4b6ea54a2490a057b6aba7e79bbfaa181b30bc690ea776. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:49Z), 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/FR58V2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97acf62eced33c15dc85e3ff7745c6d64d424f82f23217bad1eb2201e27b115. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:38:17Z), 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/FR58V2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ddbac7b77537fca3c7351ea0586a4d2dbb73dee7a4f921ef0af5b76247e4a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR58V2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f251ae49591b08ae4b979464e234d4c7b32e230db024a1880f2a783c800e063. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR9W12103003.
Adieu Monsieur Haffmann (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed852267fd856a1b022a83a5dde6096df676ce81e7f8b342f07966bed52c4c05. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:49Z), 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/FRZ662306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47189612f722072884929b1b5d78a4c0e72a16efffc983d9c00984763082c6fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ662306050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2749ab39f0a513acbb9ce9b03222fec64323f04d29ff3a58cd65756e46448bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12453817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272a611e7838b1c33d2f7a95e767a66cf902ea38b29cd817c9fe58632b41885b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:26:38Z), 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/FR9W12459168.