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 0x0df5b6ffe4c1506de62229677660db6c0d9da1f13faddf10ebb0d1fd24ef9260. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0520ade-4d60-440a-b81a-9de4f7a8e79f.json and https://artists.proofprofile.net/proofs/artist/c0520ade-4d60-440a-b81a-9de4f7a8e79f.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 0x83149bba4d4f996770533eb6ed557cedbe5b1b48eb4f7d2fb59b11cf6657dd7d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:56:17Z), 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/DEH742425908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfad9dbcc7699164988da2cd9207475ab790650c7fc6c934dbef874c23dee68. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:44Z), 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/DEH742430580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbb99038606758a1c5eefbbdc15047473d2ee04d4a38fec34555a9ea98671a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEH742433226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb82cfa4931d24a652cd1063493502db286b8e25d22b7aa995540c34bd07e11e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:48:20Z), 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/DEH742433227.