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 0xeb75095393467c320ba1681c714f729b7b914286af93e30fbeaa31f9643c853b. 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/b9151d2a-ce60-423f-9604-2587ec413eca.json and https://artists.proofprofile.net/proofs/artist/b9151d2a-ce60-423f-9604-2587ec413eca.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 0x0c7dac9f19c1cf1f83b8426c684f978ff6781b1201061e9b17b42460774f5b0c. 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/UST8K1817801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da59c3ad73bd26d6d643b028d992895fbf3810abe912aff022e6af94bfde53f. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/QZFZ52075545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b8151a1599e7e1775063af0bb525cd643f795ecbb10fe14edab0c510bbfd92. 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/QZES91862940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd074084d027e627441d75c8dc1e200b17ef661b000ba3221085d92afd9d2900a. 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/QZES71829141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b72a1a23278bd8aa0a308daad13b61cf415f2c3fb9e2bd19980d78cb28acdb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ52075547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc3c151d941f619a879547c81caabf9d24418b97f8cb2eb146bf8f17babe9d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ52075548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd074084d027e627441d75c8dc1e200b17ef661b000ba3221085d92afd9d2900a. 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/QZES71829141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b72a1a23278bd8aa0a308daad13b61cf415f2c3fb9e2bd19980d78cb28acdb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFZ52075547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc3c151d941f619a879547c81caabf9d24418b97f8cb2eb146bf8f17babe9d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ52075548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98955c947395d53afd084620938a6d49a712d8c11faf572578566850330818. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES82104233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98955c947395d53afd084620938a6d49a712d8c11faf572578566850330818. 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/QZES82104233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c5cc7bd91535b206bc85094875dbb52ddc395393b9b76cdccc6ff46e369b9. 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/QZK6N2103827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd268efd075afefca12cefdc32c73252ac0e13caae730162b73ebffad39d6694. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZNWR2174453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9daf4887c5c92af973eeeb1a25f996e33ab661e7bc48282ac04d167634008b3. 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/QZFZ72284266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9daf4887c5c92af973eeeb1a25f996e33ab661e7bc48282ac04d167634008b3. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZFZ72284266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f0422c0b5fe1aaa56777d19447823a8294fda8f57cc89485e2b9f0e6460b9. 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/QZHN32271918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aef40c2fc52f38c58e52f58bc146bcdea16f31f258b7bf8f8239ff1afab749. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES62259216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fe80edd7d4c363be7dffa95289d64d85d746d0b71ad5a15613d4d9fdca3594. 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/QZHN32271919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f24482c8caa1b9b4a2030b7534507956d843d5358ef629ff73640825cd0407. 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/QZHN32271920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f0422c0b5fe1aaa56777d19447823a8294fda8f57cc89485e2b9f0e6460b9. 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/QZHN32271918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fe80edd7d4c363be7dffa95289d64d85d746d0b71ad5a15613d4d9fdca3594. 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/QZHN32271919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f24482c8caa1b9b4a2030b7534507956d843d5358ef629ff73640825cd0407. 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/QZHN32271920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61b125116854defe4bcb07a21d33eccbef5d0c7036c3a094ec1d284c113cc5. 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/QZNWW2414392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82851db5ca2764ee6bb9efd42f3fb3dfe1363ae28348a2262d91377b5b2d61d8. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTB62406832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82851db5ca2764ee6bb9efd42f3fb3dfe1363ae28348a2262d91377b5b2d61d8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB62406832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61b125116854defe4bcb07a21d33eccbef5d0c7036c3a094ec1d284c113cc5. 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/QZNWW2414392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cb7db354cae7876707a5a6972fa7649ffb8c138488ed00a107f1c769c1939c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM6P42581695.