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 0xabd24e76bff85689745759a3f0a08aa9e6c8ef94eddb3b4aa859bc7e066e059a. 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/b93de3e3-a02d-443a-9be9-c7fa73961aa4.json and https://artists.proofprofile.net/proofs/artist/b93de3e3-a02d-443a-9be9-c7fa73961aa4.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 0x7d7cbb909131560743d4a313fb16c9fb6be4f18ea8dd1b1c84e4f31883184fa9. 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/FRZ041400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef3e094c31d8ccdcd19c9d7d18536ba867b7f56492ff6c346f2b34105790764. 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/FRZ041400387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47024d0cc1ab6862d1cba762caafe42ec45931377e9548616735ffb2955138b5. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/FRZ041400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe85f592da2e8e831ce91f9e40226e530d75983fe82bdf0fb73b308dcea439e7. 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/FRZ041400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb0986a60520e861018fd42b582bc08b4116bfbb0c200b75440fe560ada33b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ041400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c68e0fb87b17016c1bf8579f46d166474b1ff57bb0864f25f1ce9e4667fbf. 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/FRZ041400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34808391cef381a80ae59fcb0f831ccdcd52e6c4578c4e21b3da145cff95b7e. 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/FRZ042100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc8764a7e06cdbe9dfa523f19c4cd01b9073b48a0f2d7470b0ef2cab72b7283. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRZ042100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1f83937ecf97ecb319d13ede0b743a996557e8b779464e20869b26963b787. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ042100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf449c0f6314fde93dfc81bdaca14691cc95699e7323581f5345019a6fff0d77d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRZ042100268.
Les jolies choses (en duo avec Vanessa Paradis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a00589efb720950204da346c46c6c0a289367fc4f98fc09ebae4b3c7427587. 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/FRZ042100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b49ed3d9aaacb0630b9775b106ab99b0be2497909827b808d81bcb93d05978d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRZ042100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560be12d1422e5ed2034e377a5a0bb86beeea23555575c8b7acc16e5f5af03a5. 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/FR6F32501900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3e9a23583451acd4c488cafbdd5845d5e4efe92dcb8db1a695b6ea05bf4f5. 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/FR8Y72300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1c67daecd7e3232c301deafc84496582487b62723e21e0b527857449a83725. 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/FRZ041800191.