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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ce0422546f8031546889e1c4e641dfbfcd8233796febdad983b90eb2be9f7b. 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/9cfd984a-568b-4e36-ad4f-60d76ae54808.json and https://artists.proofprofile.net/proofs/artist/9cfd984a-568b-4e36-ad4f-60d76ae54808.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe919fbc7b2745de02e6d09e5dce8aec4fd2808aad8a5e17464e3942a3058cf. 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/ES5020100857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aa7fac427ff96c5521cc4c833afe3d9d32ae07c5e5ee4e67fce55dc318f294. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES5020100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f10c23182a4eaf173ae86ca9ee6bb5088678f8a22d7a7af6e1ee27fbf734b24. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES5020100867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0437469d705578ca8f832f023ab71aa646f89bc3c5043706ef20bc7fc14d6a0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:55:54Z), 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/ES5020300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44680240f55a268e52b0f032d5e4ef843031ec77e56da7c34c61b7d48ec779da. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5020300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae082569478500c74e46085f5d4df8c464ff3312afcb1c342d68788ebd9a1fe6. 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/ES6950400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b891cf3debffa766ff6af59a073a9289a44418a426a2cc74fadea3abbcdf464. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES6950400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd8341b4219ee2d875c4a5832d65d85e72078a6255e3d6073466b94eff7d609. 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/ES6950400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1914711f6c3cb0049d9011648c9be6ade2b19a4695c180826e187038d82af65b. 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/ES6950400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67121081e8eead3df327596827a43f019e7ad087255d7b85097e195f10580d3e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5020600481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cd7a135ebe24d979d6b2159a449e5941a76a2f080996f7d101766402677a2b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES5020600473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c11edbe599a3f7f4238c07f8c95b033bd43ef50dfcd3dbb538703c43331d6c6. 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/ES5020600475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413dd70fe7f22a001b9ef6ed4717465d4439760d47a642db7624858f9033bc78. 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/ES5020600476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e1e06ddbc9e7f68ee5e0251fd4a3a2a60790d312e64ce219adb1ee638c278. 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/ES5020600480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9f078bf99350199f08e90dc37ac5cc58dc5d47cb36ba92c044092a2b39fad0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5021000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279edd16fceb403dcf1b8cb58a1248f0c338f501e8422103526de55d49e0e986. 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/ES5021000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b2e4bfca517d880ced680d98136829a57830a771955a863b50758a7dfed323. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:28Z), 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/ES5021000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cb55643adf3ba0587fad726c258328c520331d1a47552083382516393423c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES5021000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc628bcfaa8fbc7d5e8f981ce4661fc1879f8fe02636d3cb452c0d403e42a64. 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/ES5021000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08efe491c2379ac01515b581af528572c60ea2eabb9791dfb9e7e9a3a1777cb1. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/ES5021300535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408b480807ff1d9a0a9d7f4a98568eb0110c95d8339d75c086e590950bbe84c8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5021300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e67987988dd831ba7d9199a55fcb453a90671de2f5c930db139d9d7291afcf. 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/ES5021300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3350575a504f084bfd220ad09464fa1b8593d005b65f814d182f3c19e47c873. 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/ES5021300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a685cc49c8bdaf06d4dc8865b2d6db7d21a0a6ebf6609a88c675b3ca100112d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES5021300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cacf4e4a92cc711d83f5de0472f164025b5c389b74d02bf015ad3a09bb89f1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:38:08Z), 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/ES5021300536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8378979d7afd1fbb87106d0c1c92f0a7b9d787b6ec336dee0e84dde0711520a. 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/ESA011690814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeddf1a1033d11d98e333013f5bbb6131befaca2d88988855f1b25c4559e5469. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ESA011690816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f61b51f247c630be0840ab20272b850d63f32a427af7e2fb63438297584261. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA011690830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b0f0e68e273934ebc00f446f8fa501f5f0de18ffe3e122f25ea052e228274. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ES20D1700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294bff9c7f08c5de8ea86b006146c11de123c66d6bcc72eba516e2fc9dccb44. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES20D1700606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe728b7821a120bd8ae056cf7fdf2a9971a02951b0758ae3ce9e1419743b21878. 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/ES20D1700607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8f664c846deb9900ec458272f482f664a638762ae775dc380690fa57c46b4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES20D1700608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f5e7c33068831b5e103035e67b6171bee82c930998590e66e153304a2ff68. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES20D1700609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b65770384417ae41d79351d37af346d2263a9c15e9c4b3da76b152c6195953a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:55Z), 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/ES20D1700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3317672db6ad3f0a82f4a544347980caaa02bf343bb76715b39070719fd37a8f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:16Z), 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/QM6P41953780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca82f193c286384c59f60b0a32d1218895c72d8917af8a7688f9c97b3ff71c3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:26:19Z), 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/QM6P41953781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a0c263d07b095eb013e999d15de1e09556f8ca0a1b1e125a9222d7dd3516ca. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:58Z), 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/QM6P41953783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d36f656eab50bb312caf79bd703f20f932cb33a97adb7cc16ec03e46bd061. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES71G2061255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b704dfa0d53cc04b1e05dd5951602994492ae187b1d68ea59aa155bd8b0a178. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:49Z), 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/ES71G2051138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9139556178e24892b7de947d2bf95ac6ce757229386ab92efcc176ca630f7ae. 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/ES71G2138832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0530dcfce5bc4208c76abd0a4ba2695564a58ef8d5581ef96fdc17659b2844. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:21:01Z), 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/ES71G2138826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c07ca34cec7582b203ceaa8830e99c5c721013ef7c0cb536fe3a4472c552f. 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/GBMJG1820724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229abd023846d8b830c8d3552e3a477cfae3870b739ef5d97107d71d41f1cfb7. 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/ES5020600471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f8006b052e0f06acb96d6ad9d76a72bd245c3ad2e62b684ce47e51c6e6a6fa. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMFMF1553303.
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 0xaa355f02124ce67a594c13c276ad9b0593e8328261be5dd62798c56ee9e0c06e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GB8HK1202270.