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 0xe420ee6727f4e834fc554ad906aa06ebcd4cb75ef71b156400ee2579f293f97d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03f1715a-3983-4e41-9f7a-af812b2444c3.json and https://artists.proofprofile.net/proofs/artist/03f1715a-3983-4e41-9f7a-af812b2444c3.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 0xb7c838dd53c747afc9c7fc4670c1a7dd9bc3323481c00ac9a5631b4f5ad2acd0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEOL52400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa94acfd8e89ffa037406bf3fa95fdcb41274f10b903940b867b9e741fd6a4f. 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/DEOL52400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41461b56780471cca2936a6f7cca0702791f458486a9df6683414edbad21565. 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/DEOL52400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9f5cc025dc1ab6d09d6d5daf0db9f423de74d95debcb6853ec5c23e9b13c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEOL52400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed0edfd3856c0d24e7320fbf21df4165c626263fde767a3c6882632154e545. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DEOL52500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c142f08076e8d277af299f06c03a999de1eac2375e8fd20e435c4db6193a46. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEOL52500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae92990d7ed5a6a46ff10fb5fb93fc52debcea6ee4f84f7e91b001e40413ed8. 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/DEOL52500050.