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 0x4b899cbb2f12567c04afc3ee58fcbb1c74d40afac31b0dc48f615552cbffdf54. 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/19e13749-1aef-4b1f-977a-1640483f65f2.json and https://artists.proofprofile.net/proofs/artist/19e13749-1aef-4b1f-977a-1640483f65f2.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 0x3df7908cc2e95620d8f3af656a81cc07e193dcde4407ca1a506c8f3cfc093cf0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ4JJ1964668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb34a7f08f161060397e3321cca8487423dd5d8b1e6fd05828ab8a2eb919b1a0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:09Z), 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/QZ4JJ1964669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9483a9e7ca05784b1d4ac6de910c50b5938875c47374d5620bfbbab53f60f75. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZES92121356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e2310bb2abc9beae89433ba29f9cd343bd363ab73eb1531d70bc0553f0706. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:03Z), 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/QZES92121358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9807730ca4ee9fb14bef69219db2bf87e3ee8f23675aaef52119b70ee00f50f4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:13Z), 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/PL6A22411744.