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 0xea83156987a744d09e0fcd88b47366fd3d1b0170f15686fde1f8683f9254fd05. 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/2aec3cf7-5fd8-49da-89a5-e00759400f31.json and https://artists.proofprofile.net/proofs/artist/2aec3cf7-5fd8-49da-89a5-e00759400f31.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 0xa0f3816feb38e54d3362db806bc8fc83d3b0f5875ac68cd1bf4430655b5ad4a1. 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/JPP301700548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcebfb434985cfac36d498babed754b11919fbc0d858f37b05f5785eb7104439. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/JPU901901088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd28113291b65e9877c842d0ccd4ffcf61f648e11116bf28bb45211f464d989. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:14Z), 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/JPU901902281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bafad040bc14d0cc2bc974b35541de743b68e1b2bf7406228ae5801d2c1dcf9. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPU902000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be84f12fc34d6cf5d8fbf453fee566dee92b7d4c5da51912e12801c14b6ef4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPU902000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586cfe5877ad238c623f056e4cd675173cad504af818d1d1ccaba325221f8920. 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/JPU902000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5577d27d367ba12b8b6c20a06c54bdab98dd47a95701baf9fa72d0a83946cb5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPU902000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d74080b6f42e0ee19b05a2913e954f606ff3a2a407884d222026248b0fc26. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPU902000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3496e862a81d146d581496b3a92064903a74951c921754563d0b42123bdc62. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:28:16Z), 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/JPU902001652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95da579ebc0dc4f0659f55d9bfb2428fa1b79d23de6950d35afb4cec60736a4f. 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/JPU902002404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43ac6a4dfc22286b61b93321420abf3100a2ca0e2ec0cc5a9d1ae369d845a23. 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/JPU902003381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3284ecc7c64c513ebefe91d860b3577bd64be6aef281568bf09f0586c9263514. 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/JPU902003380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01dcba65e866634273dd72f21cc4e95660c0c4ffdedb8b043d60cccba5722f2. 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/JPU902003374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e250c5f4fc60d35061321a696ece11ab41f130db918ed43ae6e7d439161e82. 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/JPU902003375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0ca4c200e26f86e91df6b9f1571ba03617ca1fd0381162bdf1026b287d007d. 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/JPU902100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa71877d2d89907d5cb5b55157fb1eb71c3f6eb0ec359295c474638484abc75. 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/JPU902101255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5540cd50bc9b8d05a7a46ef20db03845bad8a9ce0dc5517c6842dc71425f5d5f. 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/JPY202200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52319ad24f829d1fff9aa781c1e4ca49894014848a90709f70a2a1a03511f065. 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/JPR962200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14756790b5cdf7786919f982a805ae5d4baff6f81d7cbcce81952ff96bf2d585. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPY202200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c665570233e9a750b3022d631ff2f22013f103924931d1caa042d99d349c40. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:26Z), 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/JPY202300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e28b0bcb96a29cebce7c84a0a910ef8e4e5f914fec64d3eae2b1487e2a9e89. 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/JPV752408434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fdd9f1f7e4c08919bc5d0cc200d7993f6a170ae39ae8c621980a10db04514. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:46:42Z), 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/JPV752408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1357d214947b4197e6ab4d988706143de892b8446dd118b2bcf542faa0bd45. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPV752409161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc8c1c44b9cdc5afcf531e56d8fc666147f748a75a0ec385d2015164b3adfc. 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/JPV752409372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e28b0bcb96a29cebce7c84a0a910ef8e4e5f914fec64d3eae2b1487e2a9e89. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPV752408434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc8c1c44b9cdc5afcf531e56d8fc666147f748a75a0ec385d2015164b3adfc. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:54Z), 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/JPV752409372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243feb15e6dc15a199fb56ebd0aa5502737f13611e8244b4f7252f4f4aed1236. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPV752509829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414bd7eec1979930b750623e6b36478ae74f03a24031096e15f5f967fc319a6. 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/JPV752510033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76468afdf8c04774970cd5bd738141d433a9a96fcb4173b07857e1a78535a380. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPJ2516181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76468afdf8c04774970cd5bd738141d433a9a96fcb4173b07857e1a78535a380. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCJPJ2516181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea7f8256901860be5959dfea1960225e31447cadf6b445844540e6d3a51b14. 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/JPV752408682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cf23a71af14efc4e602976ebadd661cd1044390ee3b951c8477bea52d7eeeb. 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/JPPO02000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf179cb6cb921c6a7c6f7d19bd908b4f13087eb81e92f24c05478b7de87a85d9d. 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/QMDA72375111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e662d4495548ae67cb8f7c800460c8c869d0e0b38774493deb340c4a9d998. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JP92N2230994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf695f2805af50738fd4bb30fdd8e286f13bf0b253caa92546cbb3fbb0f9a8b24. 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/JPU901903668.