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 0xb13c9af57e604224a90ce50b280fa1f13215b65f31d5bfc2fbd8e000d0943ecd. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e95f6d5-e904-49a8-9d0f-dbc98da0a42c.json and https://artists.proofprofile.net/proofs/artist/9e95f6d5-e904-49a8-9d0f-dbc98da0a42c.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 0xa079b5c02a967735f54deced39c0f1a2a50ad3b55c088e7f8446ea0955979f7b. 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/ITOOJ1300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835f3d5c3285122d7a844884a60ab46e495effb2ed4213de7f067290c096acaf. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ITOOJ1300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432cd1daee57fb8485c286d478d04cc70bdde0b1341be77bb3b1fa1cc2a09c26. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:16Z), 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/ITOOJ1300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1af4878932cec31518529102eeeb27cd7bb54da6e907508c04443c4e4a3619. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITOOJ1300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3a372322c674177d07994ebbb915d671683cd67b0119401cbe0819cbcb268e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITOOJ1300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b6d9b54ef3e662579bece7e64b0fc6cae505440e6b700cfc106512630e906. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ITOOJ1300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301db952196d7d2522d7b084a7d061e8f1a7de2c58e11b3a3ba81a7578c84adb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:39Z), 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/ITOOJ1300359.