Fréro Delavega was a French musical duo made up of Jérémy Frérot and Florian "Flo" Delavega. Frérot and Delavega took part in season 3 of the French musical competition series The Voice: la plus bell
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 0x996c3918452d9b85c3d6aa66dd2b0bae4b421269589f9fc877e7c935f8685e70. 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/154e4e93-0d33-42d5-acd1-0053fe534848.json and https://artists.proofprofile.net/proofs/artist/154e4e93-0d33-42d5-acd1-0053fe534848.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Intro (Fréro Delavega / Des ombres et des lumières)
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 0xa3ba1e535bbb3bb60516cda11fca8c7504f945011141342994c727c3c97d80b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRUM71502046.
Interlude (Fréro Delavega / Des ombres et des lumières)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7377b16f33667fa0e585952e94aee25ea9125723b4b8d8c7f37eddb2cf5e8f4d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRUM71502049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d96836f24e70a635d5d3ea4f33145a34b34ae8ef7eb74e319613291dc87358. 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/FRUM71502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bd7a5697cc76dd434a352b4f7d864d698c207f1ffe325130d6a93ff9af707. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:15Z), 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/FRUM71502058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa864b76d1cd507d5529acb12d7fef84073cfffbb044eeea6f9f0e69778a44d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRUM71502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f11dae7f14b616f15c5ab98231203f44144f65631fb7d4d0b00d06665cd3a6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FRUM71502052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8037268415aec654f952bdfb7ccf4c969bf522bccda09e874eb9b8d45ef2fde. 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/FRUM71502047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa864b76d1cd507d5529acb12d7fef84073cfffbb044eeea6f9f0e69778a44d. 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/FRUM71502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f11dae7f14b616f15c5ab98231203f44144f65631fb7d4d0b00d06665cd3a6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FRUM71502052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa864b76d1cd507d5529acb12d7fef84073cfffbb044eeea6f9f0e69778a44d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRUM71502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754b5dcb288ba85a1b1f9fa9fc37279c6e68247db3ad82a6bb9e1ea35b80d73b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FRUM71502050.
Des ombres et des lumières - Live à l'Olympia / 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba1e535bbb3bb60516cda11fca8c7504f945011141342994c727c3c97d80b2. 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/FRUM71502046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8037268415aec654f952bdfb7ccf4c969bf522bccda09e874eb9b8d45ef2fde. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRUM71502047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa864b76d1cd507d5529acb12d7fef84073cfffbb044eeea6f9f0e69778a44d. 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/FRUM71502048.
Sous les étoiles - Live à l'Olympia / 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe684de2f16929f477e5400c8b04f9ccb28521e8142e87e5de89995ee8937a49. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:40Z), 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/FRUM71602076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65f1913bfd55f37f9e1cea8e72c8f07512f77799da5f3f7d4e8615129d26d0. 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/FRUM71502051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d248ffc7af4d9c4dc1925f33852e2c10346d4df115f2d15beae069b63f671b. 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/FRUM71502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f11dae7f14b616f15c5ab98231203f44144f65631fb7d4d0b00d06665cd3a6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRUM71502052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04c0afea68cfbcc92b842bfaf27d6c133dc7952feada6179fa337e5a715bed. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FRUM71502053.
Mon petit pays - Live à l'Olympia / 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda842f55d0c2812c811cc244c5e5badc56c0c101ceacf52fac6debc0c31d3e8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FRUM71602022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9690df87594928ee02c1a13f7ea23e6a4c5bd18fe246d4fb14ce39a3ff60d. 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/FRUM71502054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd806aa6ce01d4128e0529741a7e8afdbc90dfc09eb03b52e1c6dc16b46fda789. 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/FRUM71502063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49df25bd75da1e6772e9fd08810c70770293e07a3e46cc7eff03ae109506458. 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/FRUM71602023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83706cfd6d55104b26b7745f8d4841990af730c25727d8638f9e104104799848. 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/FRUM71502061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d96836f24e70a635d5d3ea4f33145a34b34ae8ef7eb74e319613291dc87358. 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/FRUM71502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c6dc2a04a08988f890bed9e3876ba07eec411e4648909b495861b52ccb01ee. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRUM71502056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c53094b6542fd1986c5939bb9f822c6a97bd9bba6a28f49d2b25ae097d5ea3f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRUM71502062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bd7a5697cc76dd434a352b4f7d864d698c207f1ffe325130d6a93ff9af707. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:04Z), 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/FRUM71502058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec389a9dd25f907b26d5420051d18f42cb245050a8915f11c4b663c95155191. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRUM71601936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b66b885c6ad19e713a5bc0b368989b56686953be5d0a323a8a1b0800a29179. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:48Z), 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/FRUM71601938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4ed3ebc5a2297118f3169ffe70352fdde20124aa98701907044fcdc32f48d2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRUM71601934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd26603ffb648d7fa5c08b55aa3bbca8e3628c60e7d929f19a757435cb8eb4. 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/FRUM71400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302628b08c424b26232cac7a8dd9c427330a275e287e467ad690161dd84bf7d0. 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/FRUM71300900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983790e6a1aee8432f3d732a2fd4617345b601d83a0bb066a252eabaf3c3460. 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/FRUM71401369.