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 0xaa3d24c7991b8b65ea80638c101e83c6cc1574d627a7babddfe1b9a7ab3ab95a. 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/c66f1c3d-3615-4f16-892e-13148d98d8c0.json and https://artists.proofprofile.net/proofs/artist/c66f1c3d-3615-4f16-892e-13148d98d8c0.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 0x39764fd57a2818bdf92a17a55c8e3eacb8efc05bb12cd991515b6630326e1728. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZES81844997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951ada43b2eaf894977f2b4474cc545893aba0a5c6b4da108b0a71da4b8ec16. 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/QZFYW1910521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ee3118fcdb67798a01bc529874a4294e0e3b8b3c60ca526d662c81a6f34050. 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/QZFYY1982334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62883063ead577a4bf9ea0ebf155f27300e9080f25bb35b8a6449facb88923c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ71912045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76429f71e8f4093e80fbf640a94b00cc639eb0fa91dd82ed0d5dc370d84c06c7. 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/QZHN41926222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03632a29b3653fc614984adf729dbf3ad10838206c287ad4e32975e1c5b45417. 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/QZHN51989464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97597e0ef82b6dd2f997414464d604b0af2102018500e869410d79b48d4ed66e. 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/QZDA42012085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7a7a94c946197fa1d2349a1ad808296efc694cb65dcd9da2e1ab365fdda98. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZES82070630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91161186a5f9f181a3716b2774c94a83d920a3023bbe81a0a32ddd216ea7d48b. 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/QZHN92059274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbc6820d716ef509474d293e7cb6228bc27245a555e6208feec4e8194203137. 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/QZMEN2173023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0963c83d01aac74d7c2642e79e065be3ce1ff1f696a1798b5eeca469d33df7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWS2174999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb2c6ce91d93935c731b01e977c07a4c86478c8e4846ebe67cee915b6d9b91. 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/QZNWU2165234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21cbb255c72428cf725f83c4bbb58979888d0f136c583e4bd17b13e9bf63b45. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTAS2133845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b8fc977b0e3c6280bc55949cf13597caa83d58da41695ec0dece6e111d822. 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/QZFYZ2248416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a29e28075a280edba2d315cc54f17b705cc912224822c4eee949ba4501c254b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZES62212972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be4039afc2fda1910d493817069ce5a70fb36167eb12790025d55833224949f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN62260758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7d9ed8aee77aee421ee99ff57174fc56edd7805ab68e090fddafd6997334c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN62260759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9db5d601d0b21c94f09ce3f2515bf111af0653cfd8bc64d1c52a88d8ac84dd. 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/QZK6J2260906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a94c88bc7daa21699d7ebbd4647e75ac5bb3a71000a287523c4210b202d1dd. 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/QZTAX2252478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b50527ad1ee8e39b85b2b94fdcffe3ab53c960b5cbe0aac662b1d851d8fe64. 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/QZK6H2313181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc796ac285ee8630d8f5b3b99e560b877c64da3d7efb47468c3bd9f750fbb552. 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/QZMEN2397349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c8293ffc6bf95f0ecb4761ee9e9334d55c209db9b2712302ce30a4a18e5c7. 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/QZNWV2377337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13966d7dedbb912657ab87955bc7dbf3c9b1216e1352bc50c93bbf9c862b9327. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72424948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb004f2d19cf405506acc3d5a98c17773452dd3f48244a43c06ba28e8032a8391. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTAT2428414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafab8f8250d5f9e96880e9eae70f829a73d9c903f03c5c69238f08a2aa1d735b. 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/QZWFE2411362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aa32cff53f3133bdf3d8620036053c30806adcd289c5cf956276bc75a5def8. 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/QZDA72548216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99846dc7e1b6fdabc6c32390a61f1ce79b836911e1b189e72bbc61cf84760773. 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/QZPLR2511961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691efd8efbe9e8994ae3aab1c2b6953b3df2214feb0bf3cd7962cd2953bd0630. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZPLR2511962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe303096276ff5bb7781dd1a6e1bfe5dc3328e4c83d764b840972d70cb18f164d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZPLR2511964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d41be08fb9d3643c37bd3a274346930e5d9f7c7b0bb37e036fc7a04d8ab53. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZPLR2511965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8369a47bb1f40a37f8963c5b8d106c37f3dce09d40be95b377ce1c32d0c82955. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPLR2511966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc5e83a029e7c08f4825104b0b27d3cca224b7f0c5ed2a57e3f72c14e96b9f9. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZPLR2511967.