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 0x9352b632ed9c9ef959091635100263f9e65e730ba282574258ad0b8b0afcf8c9. 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/61098f76-48f1-403b-8006-29baa20122d2.json and https://artists.proofprofile.net/proofs/artist/61098f76-48f1-403b-8006-29baa20122d2.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 0x34689cead2260fb76a103648800dd6aa8d01231ea224f529452336ea936c1a1d. 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/EGA020502476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c23bf8f0815c606baba945787a82f18fdb0c766ea73d240f28a3776f5876aa. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/EGA020502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553059965d4090f43d9851e3a7ae16204d14a8afb9412c834cfd61c0664f70e7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/EGA020500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51026301e582ab47197652b22599c78e32b72108f9f584fc000cc96334ce38a1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/EGA020500754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3ada38da87299364d92e415d9a67d99e3e0daa298cf4971a024792b9ae4f4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/EGA020500755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553059965d4090f43d9851e3a7ae16204d14a8afb9412c834cfd61c0664f70e7. 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/EGA020500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5772492542daee53adcbd4f501301bd79fda2bb5b486f96241b2123bb7b7cb78. 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/EGA150000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff526bb6a4e4236dc2565b8c434289135ffc219dd64a6a84a29b8938bb482a2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/EGA150000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd2829de7f92c16e1833a2f8472cb9142e30c730d6b67b0d88473cafb36332. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/EGA150000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380e6152d6eafab0aefd5d57f4bb73c2a74c34e921f9565f402fb7ada30630c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EGA150000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241424440abef0eeae1387299e3164081ea35c5c1e7ac4d13ac25066ee5d363d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EGA150000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e82218974b76b9df4858edf3fcd0a9b98c536b68d68a42e3ddb0166fa021b48. 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/EGA150200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61adb6e01f764d568c8ec0cfce570cda3ca1237cfe27fa29c8db73a552642a4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/EGA150200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1d48272228cba0954f9be36442cbdbf2a61eec7383c87534ab862b2fe71b82. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/EGA150200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c63ed9374db43e66f09de32a03a21c7b164ae663c334450b8b31bd26a1e2ad. 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/EGA150200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe017ff3b466640a421477e98999117a30b56dfa5386ca488d5039ce8e357b63. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/EGA150200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4b676d6fdff2d4fa4998ddf2fc3870520f250ac94a46851be22e766204f90. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/EGA150200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb430021562d640a822da0feed7cc0e8c674998d3094911c4ac1b4de5f77b58c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/EGA150200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9cd0f8971a8d88cfec64c70fb86b57ce815430bca4ce830ac82688922f1fb. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/EGA150200505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ad5e52442417a60e1348af20e26e3f6e5fbac567e85a8442ae80229535c0b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/EGA090300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fa52494fba6b71b68c99c14a0ced13acedc1d4f90f969cae65455303874cb7. 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/EGA090300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a123a4b17b53cc7362086aba9b27ee681eec9d681ae8b48b189e42339e0b31. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/EGA090300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31bdac6c88fd32c7a332f940b46af034bd8a9ab3023d42f5006ed366d4b2d1f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/EGA090300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfcc366c7a81d78d5796207b7634abfb4b8965a5dad936cde87870a158934fc. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/EGA090300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe64e86a4afe61dbb5b4679e8b170782dab917e8d8d7917a21996a8f6b5c878. 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/EGA090300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23180174632910b3bab0817fa9aebd9553006a31956c2b4f8028df68d25e1879. 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/EGA090300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7628969315e2d76a3a5d9946e5d5c92662dfa456b453056726df0e37c1f9f71. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/EGA150400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7549b990c6dd85d12c35d49a3620e3487c8ec3ba91cf2ee7559a6cd15d76a15. 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/EGA150400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb821b99fcc4fc40bea7b50b24ad3f97c3abf04c418a245d745a9395ca23d17. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/EGA090500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2478f5b8b9a0b3bf2ce2b1a315b0c4e53e00518a3b543a1865b6154f934896de. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/GX5MX2292064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d29a9a4b95cba61dc09bc26e7e532f422f58cfdf0214c2b9d8f9d3295a956b1. 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/TCAIA2455751.