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 0x90ea0dfb6a6ee7e37cbea043fb3778a965b3ae2ed08835fe8cc8659be8eb5d98. 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/f04b8002-89e0-465a-b380-767e63b17141.json and https://artists.proofprofile.net/proofs/artist/f04b8002-89e0-465a-b380-767e63b17141.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 0x4cfe4313df751697b0d50745b3578502c699867f5744a2d0c669b810173ddb32. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEOX31100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57234845dcdc6a0cbf98dbe313f505e8a294a08e29a388062cb09ea131be3c2f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PT9GS1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a033db789242f510db94490ce874589d22ebca88d2c99c5f17b079819b32964. 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/CAF861300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cba2a580107772efb81b7dcaad9d33f865247d23ba2abc4efad9d3d4b52d55. 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/FR6V80399457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1610c6716194c3dfe41f0ddc8c76e7b9837bebfe458d3f6eaa93c067e34ade. 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/FR9W11206702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b757e34daf688977e33ffd3b29e6380c16c92f953879051cd28de02f28c5c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR3V52000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4018d38e0ddaaf1c280c930a66bac12f9ed6f1c6ab37e03e0633c12d93bc1dc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL1021910879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52453b58a91cb32521c16fe72f0384d5b7c65f310c1a068c96a099a4eeffae7. 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/DEFL71801349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d324909e7bca0560938ec74c4f6e506d611acf75a449873b67d0226aaffa39. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR9W10807711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a0a2d59bf2e8cdcfcd73d1dfff68c32a691db64ea1c3bf96babfcce59628f. 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/US6DR1401983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e25faa729c6b9992e3f2d6f96ffc85e88bf40d2f56e9c740af406c8a5b7fb. 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/CAF861300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e1de975c209d77bde189e101679e65197b1cd206c85f9e7299f189306745b. 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/CAF861300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee380e08e7c679d4d71f149448c90c489f095d4a7311ad0311ceba505a7c078. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAF861300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766da6a88faed669dfd2c0e3c35b35bb8352320d962de265440ea3bd2ab9847. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAF861300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de32ce7f0a90ce716fcd85dfba8d97ec1b0ba285d152732f965b43cc06294f5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CAF861300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88892dfcc0e43fc1d1a64a907555d57f9bcb791f26461ee891dd6a550410d9e8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CAF861300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946db290dbebe0276545b676a0b54fbd44f532d9b1b0699fc3e2fe8196ca1d7. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CAF861300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a27a5713b374beb7eac418b88a440601e673fb95d652094f6178d73071f91. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAF861300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a033db789242f510db94490ce874589d22ebca88d2c99c5f17b079819b32964. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAF861300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55edd0df12ed20f0613f2eb9928a042f380043c8aca77cf9e38117e2d38b0488. 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/CAF861300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b491cfd1ffadb901825ec40695f6c7d8b5211f6525b48605847549214a5d7f. 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/CAF861300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8dd7d7c1000663386b1b90b46fe9b6341248bb89d53cacb6366f9ebc9ad103. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAF861300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c0f74990175154af9fdfe553d609edcb1a7076951c46b40df836abcd0ed3c. 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/US6QR2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9e560493cfcf0aaa2d43c523bd571ecfe9d4607978262e0f3448d4905259a4. 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/US6QR2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6482d544ae02cd791695774b32c764fcb95b8c98fd010681fd98753f238048eb. 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/GB5CD2216006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5409e0abd1af74a9e05c185a99a3c305c3097478b0646a03529a2fecb5a3f966. 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/US6QR2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c783960fd1aac9065c06a42f2a75a24bb5f0fbb453b71ba5d63b7d4aee6305b. 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/US6QR2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce113f98b14927ae3dc48b217315fa95072643aae6461f8d1d88a9b1bafccf9. 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/US6QR2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaac19c54378f3a710694c7036fc6254698eb8dd080fa63f7131e5e9ff4e5ec. 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/US6QR2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ddffd74436a922ca1a98da3519ed57b1573188e7103ccb677fb9fe81e3a1d. 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/US6QR2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a585d66a1e9f60432f0c6c00c594f0e9cb08eaf1e46cb9805fc530aba4ce2d. 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/US6QR2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8e4989854a5c4e764f7146d461ff50c37000fd11258db17def089fb5a1a92. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US6QR2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e257cefce3efd75f1273fad72bd50857901e618e63a6f2d8313ab3c72e105. 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/US6QR2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3021402c7cfbfae228d4c71aac7218a57dd40a9897c48a6365b286c51d5054. 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/US6QR2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5810e7eecffa456158f4913ac25f1f2300e7be16d5158f73e1dc25d884d2932f. 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/US6QR2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc64dd451689fa7221062b690bd7591c21a14d3b7a8fc334e26a0f05d4cdf7. 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/US6QR2300066.
Festival International Nuits d'Afrique 37ème Édition - Compilation 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976bdfbde21ea48b72d5e2a697e871b30e9b3cff4c00bbf9b524a630ce7ba5c6. 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/NLRD52041557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f0f49131b1f17a3283d561284f2aeddd8d8fe742567da4ea85b9202f8182e8. 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/US87J1300002.