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 0x066af547cc2e77de01f0417d9f73e4bf8a6337c86af77e3cb718ac98e5e8eccb. 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/ac15baa6-b5cb-48fe-b2ba-f4bc152c4216.json and https://artists.proofprofile.net/proofs/artist/ac15baa6-b5cb-48fe-b2ba-f4bc152c4216.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 0x81c8b5aa1a9b6a4e07d35a351595d838fef3e0805b2649361b37dbfef5d40eff. 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/GBLV62024798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631e69c90be9c74307fed449e95898534806ff9516094e5d5abced89c070ad1b. 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/GBSMU9751378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b9f58e7b39e23f0ab5186ca5d3c33834bdd6ec259a05af25abbbcd7d7287d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBLV62112601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c7bd846aed9a96019e1ae92c98452e1bd52445221e364660cf7dd08670fcc5. 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/USA2P2145163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4ce49966091b414db276801fd61baa70aaaf76b11deece4d33d03570455717. 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/GX38U2210390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d20a8f6ce5887a48cd3508e93d82fc8b6325cb2db546042c83742db7850a82. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GX5MX2200757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ccd1b3d69f1caaa76e72768242d216b9da688327528f12323fc9d6b37c026. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZS642230276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd99c59bd4afe06267639368e167be0841d456cea2a3d5b8cf6bdb44970f4c5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX5MY2230904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136777c471fd30e94834c76254ddf5d5cea6682a5788cdd1185d1be40eec15c5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZS652266383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda58076c89dedce154ee10be39c7392af01d6c9ec394d3febf808b55c466f19. 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/GB2LD2210319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6379fd8fca314015577171d14548d1dc6573ec4cf5f78b4a1fedfe4cf75b11c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMHN2314248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f99c9533ab11821a6f0b4c133387dbc008bf60b9731bcc81810552898e9b3. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/CACWV2334961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5b204f042daf1008f479e1229530d503c52094302cb7a8fa94ed08c4e7afb. 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/QZMHL2372535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fc1d81cfebda67dfe3c667b6378019a80b6fada36b85145568e054baa489d8. 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/DGA092495659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fc1d81cfebda67dfe3c667b6378019a80b6fada36b85145568e054baa489d8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA092495659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acbef742e6ca4bba2a5951c37c5708db0a0df6149e1945724bc45574895581. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DGA0H2493629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d5ed304b2de4501ff22f95fb701c7b531799cece009cb7980af29344fcad8. 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/DGA0H2493633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b398c3f7d935b12b087b8ab0bfeee74df819f8ba03e7a0b40492b324bedcc. 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/SE6XW2428818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede614bae49064b2cf2a5d1a05b318e32eb24a610d66942797fa91cc44799b24. 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/QZS632547699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f8272dc482bd185bcb9d2d0ea4ae0836029980b2d8f7add007daffd416687. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6XY2583955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bd313a43c74512b1254a2ed7917ca947af700d70fbceb15dd853b0cd407d0b. 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/SE6XX2573998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaaa3ca1d7dd09b2a51604bd4a0c3435f6fc1d5973aa12c0bc9f382d0e99caa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6XY2585833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab94bd3c586174651dffdfc73e3d3eeb69c3373d86f3fe0e62443f49ac4d02cc. 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/GXBDS2517369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc0b521eb3c0e957e88c5b8cad8e9fd80f0df81bb599c4d3dffbdb9c46af63. 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/SE6XW2504660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef52f915fcc44f746bbd832a5caaaec53f450e26b4da343df70f8518a463f8d. 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/QZ5FN2389102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd239deee7d193c466aaab1467046a4a7ff7863071cbe528108de498be95413cf. 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/CA6D22400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5efc7c882eddf9769b54465c9964d8fcace72f58a3cfe5d6963745cff33aec4. 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/DGA092348222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b9f58e7b39e23f0ab5186ca5d3c33834bdd6ec259a05af25abbbcd7d7287d. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBLV62112601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a93a47dc88d7b10167c0565db1ab2ae274f2444b0af539a2a2833132ede69. 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/UKZGC2308556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5169e34dc711d70acaa1aa5c9774ce40bb4a76fe138ea1fe91e3e699a8e998. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBKQU2259479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ac3b3b52a4ba001253d6e170c88ed351d4858b49f032a199de4998898b119. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTGW2401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70f9f7e5587ad4e95311493904b235a7e4051dade7f3c0e1f212adf8a2cf6d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHCR2400012.