Les Frangines (meaning literally “The Sisters” in colloquial French) are a French musical duo composed of female singers and guitarists Anne Coste and Jacinthe Madelin. Their sound can be described as
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 0xc838233abcd0ef0edeb959602bbe053f428b243aecf7157616d007414c84ea09. 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/f0b62667-63bf-459e-8044-16a9295bd2a2.json and https://artists.proofprofile.net/proofs/artist/f0b62667-63bf-459e-8044-16a9295bd2a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb9313444a872d448396dcd1399d370a7af9e9ce5ad04b8c4de1294e7b58623ef. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:13:40Z), 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/FR7S01800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760843a09cdc1daa5d6514328d79661eea15a10695283caa41d2c8982dacc458. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR7SO1800780.
Il était une fois nous deux (À toi, Joe Dassin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b2d75cf882c24a40f631d73ddfe758d36530517a7ec7048e7f4d92060f141. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR7S01900930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ad345b858568adb6eadb01c6954cff769fce30f643e32ecb00e0649daf85a. 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/FR7S01901420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5e84a8cf2930f49e57a9af495cc13c15268a739e578e842800171bd66662dd. 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/FR7S02100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c6afe61a9ddc6848777e26d1bba6f4fa5f14620e4a41bd2b70ffcf117d787e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7S02100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1553328d0c054799c02c7d8a332b6f79cf36ce45b4ff2e9c804a1445056f8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR7S02100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98be66423e99ba04660845344dca7fd57dfb121fa08b4bc40bc4d0fdd82e2b. 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/FR7S02200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a543743cc86bc541c8c998e3d90f257e51e9779ae7346ab29c5f0d28be8bf8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR7S02100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a582bc2db30fe8a59b08be5d075870c796cdcec8e5956840d1a3f5dab466b9. 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/FR7S02100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5e84a8cf2930f49e57a9af495cc13c15268a739e578e842800171bd66662dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR7S02100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e61a603bf2f09dddfe83a77611b2ffb9fce51a177b4c0c1b4ba885538b160a8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR7S02100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dce011b3ae00462284845735fc4c853d36e2ab12ea179afeac7b477e4ef0c8. 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/FR7S02100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5bd1beb791b0eaca25a1a36a65f281750478798947705f720bf71f72d13db3. 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/FR7S02100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9382a7ee00350861e840ba1abe7032ec508edf9a022459c0bb482b33846fbac6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR7S02100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2352501f9939bb60d9cc1a04a247e7521cb2dc9936d21395c02fae847301fed8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR7S02200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1553328d0c054799c02c7d8a332b6f79cf36ce45b4ff2e9c804a1445056f8. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR7S02100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135395729b0f52c6cf7ce173101d211639314ad8fe34ee3feeb3dd5deffdb7a2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR7S02200160.
Aimons toujours ! Aimons encore !... - Live acoustique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb169830ac71b74f7c67cf446240c1195a14024da2bad68bdc0f2fb5e9eef04ca. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:37Z), 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/FR7S02200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e588642cbf00b887d0add55ea4a5cf83d01a9c9958c483b0c80d0eb0d19a8. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FR7S02200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af79150dd7dad4dd9e6fc3327d74f2b40ef6b6a77ce21e5a6b525d22ee70b22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR7S02100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a582bc2db30fe8a59b08be5d075870c796cdcec8e5956840d1a3f5dab466b9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7S02100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5bd1beb791b0eaca25a1a36a65f281750478798947705f720bf71f72d13db3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR7S02100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135395729b0f52c6cf7ce173101d211639314ad8fe34ee3feeb3dd5deffdb7a2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7S02200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb169830ac71b74f7c67cf446240c1195a14024da2bad68bdc0f2fb5e9eef04ca. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR7S02200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee2ab27a3b1aa493a5d1bd29d11e1e1ccafdaff3f8f5cf7dbe42937451f213f. 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/FR7S02200290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e28cac2de3c0979d5e201d097946d138f95f7bdc6a628e4aea09f2d932ecdc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR7S02300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e28fbc67901e416f88d7db2249420f2bba01ebd42dc9e36b90c64efe62e3a55. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR7S02300530.
J'ai mal (Au profit de l'association "Je danse")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd355354cab7f45aa198ef186f567ef8e4e135148e84cffd550df4e61c0383ad. 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/FR7S02300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5657d7c2c79d47e722ce2bc0d8a7afb7fe91d14066e94fd7efdbd62d2e8aad3. 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/FR7S02300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f1a9e89109d4b8cbce24204482bea76b947a88a1d4ab01513843960219649e. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FR7S02300490.
Nous dormirons ensemble - Live acoustique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f32e9e0af39a3fc7108289c584ab5da57730f5bf1f6a7facd2d0bf1814bc83. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR7S02200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320125dba8d969e0db3f47283666fb627ec92fea74acb1a94ea949ed38fd8050. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR7S02300470.
Il court, il court, le furet - Les plus belles comptines d'Okoo (Volume 2)
Les plus belles comptines d'Okoo (Volume 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c55abd4e567f1f5d02dfe58794c029d2e60fa8579dc0d3941a78b4889754baf. 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/FR9W12126354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3e5c56890a7008c5d56def2797dfa79a3ef07eb1ff0ade26b2c2295ef3bfa. 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/FRZ052000431.