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 0x1d91c765fe09c489644e1a79be1caff218389ca8a0f21086f0c5878171ba6601. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8837101-9672-4820-9fe9-f8c3dd9a1f10.json and https://artists.proofprofile.net/proofs/artist/a8837101-9672-4820-9fe9-f8c3dd9a1f10.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 0x05094309825a9e22a4393ea9613fa1baca4edd3257d6f272b0c0a5664cecfaa7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXF119900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3f1cdb8c02a22a318e9c15a0099ec32ca6ad30db49a61c60c3195ae8f0593e. 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/QM6DC1560857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fe02eb8659e56d68856769afd6411fe3aa116411aa0ea38c7c3302b78bcc21. 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/QZ5AB1781815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd35df01e33aca83129cc5df806c7beb60e503a0d32e38519d47d1241cddfe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5AB1781817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268751ded27fd2222a4fc2be4dc4fc3fe8aeac22704b4b785062fa30ee2c2221. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ5AB1781828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb634b396d0b5d17df1a12448b57eb3137abf672838f73190eb75cf4f9146dd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/MXD481804512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fbbc76be83d06c151d28b9541c215013c51362759beddd3d762fd4a5ef568f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNW72305923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d8b9c4c84029fdc6707e621d284a5f46b45a5a15300000ebbd7a91cb92b4ba. 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/MXD481702741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0a2834fff0b6c1a792be50e752089a57ceb101ebd0decc634f5028a18d125. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXD481702745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67389123259165a08d82ac279fb564355ba27b1df7b0e6de9ac51ec1069d290. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/MXD481702747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca62870c2e7dbea8c097781c0c454c7aa64fc0e929e8a973a165aab46e90644a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXD481702748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe6d99837cd47275278b12999ff11ab2891bfe72b14623b88096cf22b50256. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:04:38Z), 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/MXD481702749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee7dee760afafdb87ed9c09c258fc13c182774e67be4e8be97d1589ff40e922. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/MXD481702765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa4d8f2857782d531d97137814e19fa7a2de02fdd9dfb413758da45aa43c7bc. 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/MXD481702766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f8f34b18d0e4434a8fa9e1ae327da68aed48d07a1ec5bb6ce1f2bc01b49a52. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/MXD481702789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f5d4b5bcbed9c27ee5c8489c34d4f19a1f92054ce9c30e5a4cebc20e5d128. 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/QZNW72405172.