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 0xb7662798470cac1f18c02e87ea65b4823cc2c545e8b2ead03880d7dc59235e7c. 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/f5c99131-9648-4d01-98b1-6f102b73261c.json and https://artists.proofprofile.net/proofs/artist/f5c99131-9648-4d01-98b1-6f102b73261c.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 0xa31a0e43e3c79ce35a5a15632b38b3afe877ec50920cd68614cf7a65cc5c07ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W11416191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05594a9a4c8185cd55cd909bc2a9a27139d4290cb7ac5cf2e3b30c2fc37ae30. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W11011793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a39936cd4aacf8bbc752e43bb3511439cdbce25d9ec1fac832d3f7383e7b0e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR9W11011802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce915894213f1f415e13d74c5839519306bbe149f185fc304857da9784f6d66a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR9W11011806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527ddf11d7a067b6d920ed919df92446fde701c566efcfbcd50a14954707ddc0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR8Q01200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f2c2285d41c37bc3e6acdfd143f184b1e4a039bf652451969eefb2ecbbc29f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR8Q01200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe55b82c9a89650891a1e69141736c981c76bc11b1a3b41ec70e308a8cf33a3. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/FR8Q01200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c4f955ecb96cbf3fcd0415a113c4a8ba602cb5eaf16f38f46e17fcab7d558. 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/FR8Q01200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d349d98a20b8520cb6ffefcaa8b39fb072c93b68a930a2d1a5ab10cf777de7. 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/FR9W11722890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38299ea8c4e7fc6dc3dc4acd4ae1827848797a142153cea2ca1ab6210cc4f8e9. 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/TCAFY2152160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6282f7008e4129b2dc62f37d3d7a6d42d9df93dbea1174310ed26cada36cd19. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAHB2351099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe832d35b2d528a73865fa1713d877233f32463bd9badd71bc33393b4d411e5a9. 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/TCAHL2330078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe108baf1ea9d415ff61ee9d958cc4d70717d79078b40b6d9def567a1a64269f. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/TCAJL2549570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b599430e93dff441ebb3957a332ea8eced66b14cdfe1d656a6e865f9db8d52. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT65Y2571528.
Bayonne en fête (Album officiel des fêtes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45bf7450455538001bb302ebd22a744364915600741cbe69ac20932591e0e43. 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/FRZ511400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45bf7450455538001bb302ebd22a744364915600741cbe69ac20932591e0e43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ511400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfa17b0614da3a47431242af3cc7c2912010957b8e7f4517edb643bca9df30e. 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/FRZ510100015.
Paquito Chocolatero : Dans Un Verre À Ballon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c6e115e0a55ad79eb60280e6a30d0d2914a9f7ca1384922eba8452c1256c58. 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/FRZ510100016.