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 0x54460e98b94031d22a3d60f62938c55b25882ab8919b0f7abe2971ec073e4c77. 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/7e0c5b75-dd4e-4887-b376-7b122a0ca563.json and https://artists.proofprofile.net/proofs/artist/7e0c5b75-dd4e-4887-b376-7b122a0ca563.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 0x76c6442c48693772db93aa364a4276027ae8eb87f9f15825b8bc9a0c7d11a51a. 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/QZDA81994364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937caeaea1d3d408d7b84f554dab13a8d1e427d6021fa18ba459ba5fd9ecd536. 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/QZDA81994365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8cf3b23e0c16e7c51192d6457a23ca0a5939d30755670c62356880e40b651e. 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/QZES51960759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4baa690cfc7fd8d0dd3d4cbf4be1355b617918000533729201300cf2b961cc. 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/QZES51960640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90f1b2add7147b3c9cb0d08e713f2d40a92dadef7311b5535cfc24d9b5ebf70. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZFYX1945267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77dd38345bf3464357533e260423f3116bf5f69cfc0d867c790d588a08f9b16. 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/QZFYY1994343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f99c40e58f38a45cef6d7195651968361e4bb7719b539893f990f8eaf5a73e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFZ41945656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e23a090e70b70eb10857175502465e48841b7c1801f26a0442db51ea8c1199. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6P1997212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b1977504d05fec18d86afed0b5f9b7c8ecc97708c90ddb07f0e15e3d9c1490. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFYY2051600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db65950eb37eecbb93b1856b0586710433bc7246e99ae7bc4696e323ca0d10. 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/QZFYZ2031673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2b2fe5e44015eda0ee333ab9a91d0efebc8dcc4a086dba45d985c48c256f2d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZFZ42030687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b16f09e78803c098aa1e7b296663f78069f470268c4570b9013d20ee6ebd03. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFZ72064316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9294926e4899687f6b15ad14508d94d6c673cf9a4532bd5496d17a156f7302c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES92021211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1130538405ebf76f38cef015a09f2f83cdb748647c834e2ebaf31332960b03. 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/QZHN82065895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be454bbc0baa9536af28f21e9d251b0f07d556780bc98cd948939c40530f30f. 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/QZK6M2035300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469881bbf5ad7b6999f96d0fe6ff57234e3ecc7a7e00da72be0e1d5d59153737. 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/QZK6G2021317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2c998c2f6c361b90d77e46bd25667a930aab5a57680631454ab858148bc0b. 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/QZK6F2044003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf3e1a4a74c55c1de8a89681d9ef4d8f88b94d78668bf105a29c3ab14a5677e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMER2027351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb753a6781dba3670dbd68b7ac5b6b6f236060570d3298ed53478c5be691a3461. 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/QZDA42196775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70a40ef70e7f19c794cbae4060f209c49c58cfd81789beac2891ae69b13295c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN82104476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc071d6a2ec1bee21dd44a937249f7248545bce0c0818ff6146fb9717d1e65636. 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/QZHN82104477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e954637c3aea7f720fc72c632a2516bf1caabfe19858b366024afa366c29a2d. 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/QZHNC2175813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad50f3184a95e82484c3abed7d29cfc4514cdfe880b27142c90b56a88b8b802. 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/QZHNC2175815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d4aab861c8c164182f07a5ef17805875efdf07f95ccedad5f60b676c7b4ed. 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/QZK6F2135004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae98b96633c26aa047458e40593a6898ea2a3e9f61b965e2399b0773925179c5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWQ2151632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88da1c9da2c833d064118bdbe852a753963e3776d0dad8b6f97ee5b689d6c16. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWS2198130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd019c402cf33e4b3f366b2ef29fe4db75591cfd98643ee725cf76f06e5501596. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2198131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5694683e2e6069e612a4d9e1570396c35015bb0a5fe2ff4642f781a6620f199. 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/QZNWS2198132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaafd604bf168cac4edf65e8c4b17e09ba9f0edbb098fe9d6faff479532ed946. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNWS2198133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b675d92da02bc6e21ddf6583c2ae0a8e68ec6a33e1d323fd44f0b4470ab6cb. 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/QZNWS2198134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc085da98667988ca135685155c619fb1687436478b2a284724e0442675d45b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWY2167153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b8718179e85017931fd01485b262e14acd0bdae88e33bbd55b55ac993ecbf4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZDA42296437.