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 0xa31dfc8d550d2b3f4e28dfbcc01bbeaa10eb8046b438e42ac078b01f46ccd4f5. 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/3b7d840c-d258-44d1-8a11-3eb7edac7a63.json and https://artists.proofprofile.net/proofs/artist/3b7d840c-d258-44d1-8a11-3eb7edac7a63.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 0x8036371d64f0cfdb7be135455ff222bd45eb9af4e506f5bb64e53f3602bd869f. 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/QZ4JJ1961418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d05fd5730524f118bab5ce70a1b660d55fda5a8e8fbcab7750614c6ce3eac. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ4JJ1961420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec44d4e0f34854eb7a56c87551af4aa297ec96374eaeff1efd1d5316d3415e0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZ4JJ1961422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcbb1a262cdbd2f448c4954b2ead9fbf1fb675da277c0c5dd7ef9c738b0b7cb. 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/QZ4JJ1961423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e06ec834c49d5173d340afbd31d86a830a210e8a8e05c1c72d485434e61b8. 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/QZHN91925742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287d0301a3f731eb60117535245b4379e3aa2a07a18d5529c48090418f06682c. 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/QZK6N1991821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce3abf8a0cf9254357e53c9a18222191e0ec2b54b29e03773a8a28a870bff5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN72244094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19d67066ec7329e89e779a9ee8bcdde76fe26d02d956d144bdfdcc0ca76aed8. 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/QZHN72244095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288e2720dea389c4c53620a65f03e68f34b77bf2009802989acc5ff773ac371. 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/QZHN72244096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebdab3169be439fd160fcc999a3d0468fde350213906fb4accc6a7e729b35fd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN72244099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147a04f2f52507307cd3cae966506a88c6a1afd77f429d7aa04913c40b597f18. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN72244101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc7c94b6d719c80326f988d6a93e148aea1771d82fdf9c9551a1bdb17a2742f. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZHN62260752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea5d4f8f6bb5f76b42810328121baaa4e5c30d5011d3e46d15cb9d29cb34ff1. 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/QZTB22263532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cad73dc919fb92681b8554f666345cf6f7d7f73c48fc9532d1b3e61c73e68bd. 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/QZES62497643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71465d50667a4767237678f038dda37339bede86d116bf3583a92f13664b74. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZES62497644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8308cfd37d5d6050dd6d505fd4bc2866438480750afed599a84a630846416fc. 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/QZES62497645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aaafaef2f1850981c7eebddcd025c6e4c215f45a82212ec1f722a2d48915d7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62497647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e86e5daa82a834b741f2cdb18b0413a5d5a38fcc1c3329213777c1d4b6f125. 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/QZES62497649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae805db5c5032c628baf454851e07639032f3254bd1571d20385654f0c6786eb. 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/QZES62497650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42090f6d30121ed7ca99413a973378535988e4a57042182f0064d67d962c8c78. 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/QZTB32520643.