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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419225e2fb020935fcf2e98ce5581e6e23bfe50fc5711bf7f8afe75253b04530. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85160d76-cd54-4ebe-b35b-d55e22b9ada9.json and https://artists.proofprofile.net/proofs/artist/85160d76-cd54-4ebe-b35b-d55e22b9ada9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb44cd4770545231523f8e486439e361a7709b6305d8592b203286caf76664c2. 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/QZHN72123033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7d3a73209f92e765750b881960d0f0dbc84b65af6e284be72f73dca6ac1dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN72123036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d29e14a854caa7efeb127d6c92f1084cd0466895526f616b515c180cabea6d2. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZHN72123037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f4f756aa9a658a44b635fd9a21327c361307dd59eb3f7c9ae934fec3bbfae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN72123038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb128a28a9b11c31b38700e3410453e00887f680c7c55aa77cf630eb2c324b81c. 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/QZHN72123040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96570d6daba9a246c31cc6f8bb717214667dd0ed504b71d30b8960899e6e37a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN72123042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137f25f95d0c03031e50d85ddcd669f76849331e2d08cbcc30b34943107e6fb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHN72123034.
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 0xee7836f978a9d6c76871fd3f31e6b82dbae023cb7258436c59bfd5870ecec128. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN72123035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d6c8af2d8efbcbf46a3e666ec7af4d7ff2b3b3e72b7343bfff30862e0a3fd5. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHN72123039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e3506ea5cadd13c1806aa6c0c780b6baa8a86fb462043338538ba7fad4564. 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/QZHN72123041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a53d2d50ff2a599ab33c7e21db9e135b3d8ebb36b40ec11fbb29ee1918e012. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82102690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627d1f6757eedbe8715e10e5bbdcd8bd28305fd93922f1615a0a83007eeed817. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:14:54Z), 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/QZHN82102691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04370f8d7285aea81a8e32694936d116bc28a5bc2f5e6d97c18a1d61bb597843. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN82102692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df73907710ad7d013e302285c1d82c7a489bcdede23ed1a3d85853a409843c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN82102695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f999e97b34f7e222e69047d35c503837ae6cb2b104acebb9e94c12d9903b6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN82102696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9217b832325efdcdfac738a9b424c6091c7b04a39961ea05d7fb0e08c7efb885. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82102697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6cbc8f41e448820b4ae975984a16f3b94e6c8326301c07c4c71574d0d23d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN82102699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd5069154af0df214388bd364d63f8dd153be18f42a37cdc477f477192ed861. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN82102700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0998dd6b36f65d732e787a52fb6d9c6076148835e2d86feaaaeb2ea593e75. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN82102693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30befc56f2665867378ee49f1bd07c840878542699e7426c334b3b19433914a3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN82102694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4214eaaa9aa9b5e7f970f86e73ea1928183d4025566c9785023565d37f9d8d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN82102698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055ed14e65a25daa9fb7aa0bc7bc773812179317c1fe19ef3f6bcc82f24d942d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN82102701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48efd9ab755926d452ece5e0151dafb917abb563bcc81ae31397b96bde63239. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZHN82102702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8489b02f5a125c9e11d94b02cf07b8d7c2804b4996d6938d01e0002902b719d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN82104022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aec18e78827dcf39cf3415d2bb308d21e9f1569cce70625923a3f104d46050. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN82104021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b7b68e0494b0e24dbd40cda040d8b431fbf78eb73ff02ea70bb7a56b39308. 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/QZHN82104023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cfeb73db785aefd29445a038d00874151c5896fff2c05b601c1d8663c84444. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN82104024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fdba88ab263713e8d22aa1a26df9ea35aafd509d31ae7177dd4196da91a29f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN82104025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae2886a0b75102936643c27e00322b4bcafbfd9096fab9504ade777ca92cca5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN82104026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7996744a562b0e04d60cfc8415ffd7fac4e972094256ca5ea01892bceae307. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZHN82104027.