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 0xe39a8bd36ea7920585ac6c2645d998cad5fb454d6535ab65f889edda33b70d30. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dd381aa-9c18-4927-b96d-0a7ab9b67134.json and https://artists.proofprofile.net/proofs/artist/2dd381aa-9c18-4927-b96d-0a7ab9b67134.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 0x5edb5ad6647a59418e7d3957789c275d905e030364820f099718f89f43ee781b. 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/QZXLZ2401948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb956f79c3ece94a3e1846c5e02aab7e0404926a51b675f1d3b54c97ed94dda03. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZXLZ2401949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49e9899df8b4a89cd325089d5f111f99610c0de481058564c0057ffe76b1cac. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZXLZ2401950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7add2c54374f6a98aad380d406287271b7c10c5bba55c22536191e3a813d01a. 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/QZXLZ2401951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437a0428806755848bab2ca14ee3ace7a84ff11d6f44e3ff704d8aa3299f1a6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZXLZ2401952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974348da97c675231a68f195751a6f38399da69f5412c1936cb3396ce1bf6f19. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5BU2546415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e02931b8f426007e15e3009aedd1c86eccc4cb73b03ece2fb9f7e6e8172bc1. 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/SE5BU2578236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e53446cd7b0c76fbeafd76e5c28ac594f6348a6fc0f7906ee1f83ed3cf84e0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5BU2580057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0b0f46b5e5c3e139f0244b7b2c98029aaac821661c3f6f09603a8fcad92165. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5BU2578254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf6a11cebd7e652463c4261e058727c6fda3ff8c1c0036dee28036ded0f8248. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:18Z), 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/SE6XY2504949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0732fce757b836ad92af944e1628522a92e299f8ad5afd8bf695e2faebfd199. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5BU2578251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056f223388a797e25a1f5fa830a3efea78d465ee5b085109030d93f02aeaa51. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:41Z), 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/SE5BU2578249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2545020fad15c45b78bd1098864c9a734a352232bf3978318125e8dcf7253a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:03Z), 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/SE5BU2578253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60579bbb47172532aaf878ef375f456c94c6b5d9ce5aa737863513c8522faa6f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE5BU2578255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805ee2120bc4a75279f67cf26fb013d4071430cf1837ab1a624f42a072a12dd0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SE5BU2578256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a940de6b72cfc0427ccc2bad8a10e1fb984fb919d7dcf9f4f8c88cf2fc515f5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5BU2578263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf349205e1d517adba7899c5b768b8f9e66c73c2daa736a6a6ac1eb61a1babd5d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6XY2504948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcc2e9ff771f27477fa18a11e9fa9b9a20943773c0173cd8d52cf978446cc17. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:14Z), 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/SE5BU2578264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f9e9895f249ca4f9326d71e1d6fb24e8a396c05a85c1ab7d7c8c1d7005d0a0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6XY2504950.