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 0x4f2dcf5fdf598ef00d15717c898320d8879518d759ff851fa2b5da2d3d6f6679. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdf3c42f-297d-4198-a147-d92b8abb97ce.json and https://artists.proofprofile.net/proofs/artist/cdf3c42f-297d-4198-a147-d92b8abb97ce.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 0xa2f6e020622f73854a0e8a60cd594dc7089e8a7055453e85a3b67898bc217c91. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM42K1704656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d06de33169fbc90bf7f9763f3d74bdc67ee01af3f45c9e3589995b1456ef0b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM42K1708462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa17e745ad32d265614e2e5992fc38d3920aa3fad5a2862c7ee19343f0830b3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:28:40Z), 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/QM42K1710844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1819dfd2d9adc1e3450bab71dffc66ddd301a272bd3cd39928ae61a108a43bb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:10Z), 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/QM42K1710846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d4263f49aaec2f53e84e6110fc2f67c076cd3c5c243daca52e494edae15b9f. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USUYG1386414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09d97783d3dfbbffe4a49b02b69aa6b8ba207c14efa6a29b2f4981c946dfaf0. 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/USUYG1386417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8189a2d4437c562ac3465f5db6d0d3e58c2c9b558f3028b23d12193eaea66. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USUYG1386418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc2bf5f73eb0352935c2ec331dc1a7f6a5f54b3a05768c5493443ba8f37dab. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:31Z), 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/USUYG1386419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf062de2ab8954b559936c22871d1dd4c1a1dd0d7bf1723a933e03cc643b9f8d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:16Z), 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/USUYG1386420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65da921e117e4e7e01839bb600f98de4f389a7a9c3e83d2d556fa45a0e18a8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USUYG1386421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ddee406a9b3f8f99d8122e21865fb0d17efcd96ee4debe2d8e04bfd73f3c7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHN72195223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f07c4e77e987d8c8b72eb8850a72c27836bef931042e8035853a700f9f2b41. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USUYG1547360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4296444008e84831b7a712e7ec827271c4b0e9b38fb22ee19cada087384849e. 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/USUYG1425719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f0ce11fd5602828ce8f885472843b2c6b933fa46c2b75c430887c324275867. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1425720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba633967ca743f60f426d7e58058712eb6f105e57cb18011c3e5cefe36424b. 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/USUYG1425721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35847fc0f11d574d17c7e3b004f5c6e7089e9ce562b238f916f31e44913de118. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1425722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d1c5f3df3119c416ea351334bea24f5f974666bfd7e8af3fd8fb9c482f9c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1425723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcb681078ce246d1df16a4946278c365e5194f6cf270169bd8f2c18933d782d. 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/USUYG1425725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08951b2528f6ef7a7137e6a328867015e4d977fd053a27f737a3ce1074be126. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1425726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909714c18dbe4db7537613fdc48a89db56d500ad117d2d78fd3f86ece314f124. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1420018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba3f4e561c4b57dcf3c662ccfd3fda5af5e3c03b3a432178f1a448fcf907737. 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/USUYG1425728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4321d03800adca7173c0b93b5002b8d09d956eb79a6b00781e54db779e48e2c0. 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/USUYG1425729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf075225d8faa235e9332756da8a4da6b7e7313b05ad359f8321e37cc81f5d059. 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/USUYG1425730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23802149592ec25d78ff175cf77dc5f26837686be7c0c4069f7f19d7bf2c6ff2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1425731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc608c30c2530e961f2f229a01be727b79d2d47a7cb9f1c333fe5727ed24b9535. 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/USUYG1425732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec5b006c63ed33b005bfebdd284cf6f25b6ee1226177c1665f59fe1ff8ca52. 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/USUYG1425733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bedde68b6cf3accd094294fbd3646b277571e238e0828435f7fc5292d73abd2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1425734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ff4375b762d6fc48f171c7800284ced88059dde78d2d936c61ec8e80bb01f9. 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/USUYG1425735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e94d7d3fe8a140da690dbd037d2366fbb8424be30764f0c030c54a18b46ef9. 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/USUYG1425736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd935e06083e2ceb152f4bd3d4805b270a32155be341a19cbdb5c7c8408dc46. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ72266707.
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