thumb|Les Frères Jacques in 1968. Les Frères Jacques were a French vocal quartet active from 1946 to 1982, comprising André Bellec, Georges Bellec, François Soubeyran, and Paul Tourenne.Billboard - Ju
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 0xe38337afee07c6757d97ad171da91b25f37c1b8f1248bf61f3e4171917219e6a. 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/51a60cf3-c644-4e9f-aa7d-884cf4492d82.json and https://artists.proofprofile.net/proofs/artist/51a60cf3-c644-4e9f-aa7d-884cf4492d82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
World's Novelty Champions: Les Freres Jacques
Les frères Jacques en 20 Titres (Mono Version)
Meilleure collection française: Le Meilleur de Les Frères Jacques
Chansons françaises (20 succès originaux)
Les Frères Jacques : Le chant et le mime (Histoire Française)
Le tango interminable des perceurs de coffres-forts ... - 20 succès
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 0x10ba7cd187e9ccf6ef888538f03e21129d48332b071de9e39a3bb1cb4aad08c9. 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/FR6V80761000.
Les frères Jacques- Le siècle d'or: L'entrecôte
Les génies de la chanson : Les Frères Jacques
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fb6b0e0160114cb38b3bd9b6639cf622e75ad80597e54fb070205dc8961f7d. 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/FR9V00900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21f0ae6b3c5011f61dd164d103ce5fc3dab674a95a818e0fd78663d81624063. 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/FR6V85700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837da219d3e87a06edd6d510504209dd336c1260d9d682206a817b2f68df8ff. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR6V85700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8c1fad00c3c95a440bf5bcb75e25c5bc0417ccd45027c78a59b2485374213. 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/FR6V84900073.
Souvenirs (En public à la Comédie des Champs-Elysées)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9904de1b49726dd0dd799f926f650830d01ef2c5d735ef1e392933425983ec1d. 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/FRZ839897873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e8d1858a7777a3efcc292ceb496aef45d561aedb137f322f954b405eefa558. 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/FRZ839897880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd0c2364b6089cf1b3a317bfc16138525e5565272f8cd16c9efd71f843b9fb. 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/FRZ177510270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeb15e14d75bb9fd8cb4c003e7675eccf8ecfe86487673f8e44b525902cb914. 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/FRZ177510280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fa84daf3eb1fda46c432d31706691cb68506218d3e6f6ca4aaf194ed86ad1. 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/FRZ177510290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c3045e417f104066080739be15474f6b0ffb3c92eaa5baaecd60394dada678. 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/FRZ177510310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62178faeaadc3bc352a3341526a4bf501c68385baf5512e4e98846225728a856. 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/FRZ177510330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2944903831eed2cbc22b23ade9a13e357033078c323451e2fecb6c01c6e08a1. 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/FRZ177510340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc43c5f17cc0e09a337b12ddcdb441108a65f0447b1b72eaedf8e710fabfa20. 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/FRZ177310180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee20ba66e0868ddff64244f7472114efcc173e690d6683003ec048ecc8336d2. 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/FRZ177310240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0bc9865dc8f0bf435dbda9e744a795337cf64bbd290e84fe92711c20cead5a. 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/FRZ177310260.