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 0x83cd532bf11becc28ff692e169f253a531c232b7e5810b8e05fa45b1cd13c144. 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/fbac3fd3-c976-4716-9f12-d51d39eec5bb.json and https://artists.proofprofile.net/proofs/artist/fbac3fd3-c976-4716-9f12-d51d39eec5bb.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 0x210363851d3190ef42ed61154fbdc6f1304586dcff168ff47e7112f1f200dfb4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ42138006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425c3fdf452301aa12bdd250da1107e34434d20a9b1816e9abddb1996d997c7d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FRZ052100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eaf8aebaf17e5c07e4e774a26087a94cc3d5540d3e5142bbb64ca9f32f3edb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR9W12118484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcf3dc4710e49e5673b981beb0ba0217ca6c06682229a3b52655adb294d957c. 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/FR9W12133242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30e51f603c2316c4ebe2601c2c29d47b57869313f3e1e0d86a097155f527bb9. 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/FR9W12137546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2dedc4b2141b2bff62381762ca7abcd344f88f096bba4145f4fcd314df4d5. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FR9W12140601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0762fc12dcbba01dab58de46ca088f789f2916b9a73d4b859ab8f598a3105b4. 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/FR9W12140605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b39ee767cf2f7275b9bfaccafea87822a0fb6b73faf426f8fbc39b347764a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12201833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703d7f322bb9b318ab4e6ea8ba1248c4cec5c68fb5a12ce956986ef8afb22555. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FR9W12205545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6df9d7e510ef7a97fd68dffbd07bb88a8a15ede48b0d2cc3b71637336fe175. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W12215888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd3217ad797e231c8c61bd9719e4718db161dc336e9231c2f84b60b6c9a96d2. 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/FR9W12217983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b36900054c67afac646063b242eb8a89616fd195fe6b2f95573550d81c4025. 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/FR9W12217986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1758ad3e64407d55d2b178359b6c26dc6c843454ffafa61d7abcdcf86aa003. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR9W12234383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273c9f7eac245c35af05467d04932d2ff0ac5a4f2754bc3a52d0c8af3b4121f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR9W12240412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc3883cd73673afc91d1332ce569d9da85628607b9c589a7ff8d22723cb5b8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FR9W12246318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f14beadaad9c084fe049fe0972513241aff24362ec98b4bbb77f39e441ab9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR9W12302032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e10be65a486484bcd16e72ee9ebb68525c4e05eed799a69dd6b679a6299d86a. 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/FR9W12317963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c100af5d366d8462af0f68257800b0608235b951518eb7b53f990839eb42b50. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12359835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe7b5ecb98b4c40317c7894b64a0056c040fd5a02c03e2d6cbce8fe1c92916. 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/FR9W12408422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebaddaba45a92eece162a2c5817c2bdbbef0e36f62f75252eb27d57851eadf. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FR9W12420456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98301bd09cad96974bda7967c9fc1e57fb522404b1f22531f00c7c83f65e36. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12430141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeed15abf1a9b3885550770585d33f5a3608c40124609f34e52b4e6d6d8a2016. 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/FR9W12430142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9e2ed056befdd6946c2512f819e7db9cd754fb3a8d8a17165d358580646107. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12416028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f818d9ba2cf6b12a0e9fdc5978339501ff2f5552a1bffd5daa2627516fb6bca. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12430143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe7b5ecb98b4c40317c7894b64a0056c040fd5a02c03e2d6cbce8fe1c92916. 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/FR9W12408422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176061eba064775da8e7f6edcc6e07c291cc9c7da54d25bebbb6ac8684032279. 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/FR9W12430144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebaddaba45a92eece162a2c5817c2bdbbef0e36f62f75252eb27d57851eadf. 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/FR9W12420456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e4154cf41b3a43ab5f6c28371b4c6405cabb9de0700c6eb1b19f1895c8682. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR9W12433087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc0c65827005cccd203ee134abf23fec3ed0449de7c65c88248a4c13bdcfa01. 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/FR9W12430145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a1540a9e54f10716218b7bde9e304647936882336b3c5d09fc9a8ede39f32. 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/FR9W12443679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96aefba113ce1bc9b5ea8194f8deb7fb369db7f34dec26c9c70ff20ac693909. 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/QZK6J2487130.