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 0x7b8c8e2ffdaf7308fd03bccf0be2eda610ee3719d4a70571a145c4caa8e574fb. 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/8353c38b-4980-412a-b580-45bce367a8be.json and https://artists.proofprofile.net/proofs/artist/8353c38b-4980-412a-b580-45bce367a8be.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 0x372232103e2d4492c43e025cecf4385489e3049d359d74e76ca50ed7b3b8fea2. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/TCACJ1551430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c55474183f5ca8a0fda09a6cf1d8bb2a050f30742a3aea1fd61a242dbcd75b. 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/TCAEX2023883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf717a702ccb05543126e2b41733368169dab5dd678cdff5aedc873c3fb2d690. 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/TCAFB2037553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa02653e75b9029bad92cc8f416cd38489c063331033ee4a7bf79edb540f0d. 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/TCAFT2118580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770462d3cea1142ed75a5e49d0ea2527059193befcd608b9127b30253a790701. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:01:08Z), 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/TCAGP2227986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684494d2d1698ea6a1afb8ed969561fcc187c620bcdb06f0ee1b141db121686. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:09Z), 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/QZNJW2526500.