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 0xd43fcf9d97c67977a8b5d2743fec6edb71ba7428849eaa8c9ad04f1b62b46c5b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d607f386-3c6c-4d76-8c4f-16cb5129269b.json and https://artists.proofprofile.net/proofs/artist/d607f386-3c6c-4d76-8c4f-16cb5129269b.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 0xddebede0e77ef9002ab784aa7fa181438b4d50d63b0dd0548d7c6b684aad6163. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ES71G1858792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddebede0e77ef9002ab784aa7fa181438b4d50d63b0dd0548d7c6b684aad6163. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES71G1858792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca4fb26681c435fc297ad9955086e2c44913c744a3e614a7e110847c6dab994. 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/QZNJY2170301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b14d7caa5906822f72798f0c5dd712f1e44ffb65be5a4d6765c3e40f3ed5c97. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJY2170302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b030ab4e25dc3ed94566e778bf00dbbbc04d1e392b9661df88d348e430d05. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZNJY2170303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311c7378ef4e36bc4007e85f817136c0a6de89783646a955aa51e144a614c40. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJY2170304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d57e9c2a3ec7e62e0c0f20577b8bfae2748d185388c30635d7ad6867ad1e7. 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/ES71G1872769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58513b4f1527d730d7d0a0e67a0d4ae4350e7906e58ab1f51dfa2291b554b6d. 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/QZNJY2170305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d34f56b8aab32cc9d0bc5c6d8e7e4bc767a42eb79d01630d17fa48175ffb55d. 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/QZNJY2170306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dddaaa021f369db2eb79f11e72461ea9899b9fc0bd33c29e0fcfb7e5dcbc8ad. 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/ES71G1872763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3689782bbe0c0c48de0a64f6adf1abb1150a589d4841406942c9a8f1417c3c. 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/QZNJY2170307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b309bd0f2c893dafddb80e9499415253f21c2c2670019d126aafe4322beb973. 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/QZNJY2170308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddebede0e77ef9002ab784aa7fa181438b4d50d63b0dd0548d7c6b684aad6163. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ES71G1858792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26f2f1dbfb5314112660506c9e166e0b59335610ca7f6aada1d70c2835fd55. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZNJZ2311733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb83bed26bf14eb1b12e7acc75ba9a229a600daad67b1e068e50b177ac9d69d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZW9L2346204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b2606dfad8bf6fddd9d0e33f084b75d75078a3f4f13ebaf4d1cc94eadb74c4. 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/QZTV32570810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8e97078fc1701283151e85b45a3fff0ab4f4bab63b11916c7c9aae1984e170. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTV32570814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b2606dfad8bf6fddd9d0e33f084b75d75078a3f4f13ebaf4d1cc94eadb74c4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTV32570810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8e97078fc1701283151e85b45a3fff0ab4f4bab63b11916c7c9aae1984e170. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTV32570814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a2b484f4fa6d6aad0c878e2a2062c986519e1825f4ce3c47b0fa3916cbf91. 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/SE6I32005163.