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 0x9b548abca38ab3518d334541c30183e5fb9b35677eb5e76dd253f241896a50bf. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a86c876-9cb7-4df4-b56d-7527e6efb679.json and https://artists.proofprofile.net/proofs/artist/9a86c876-9cb7-4df4-b56d-7527e6efb679.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On The Buses - Title Song - 'It's A Great Life On The Buses'
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 0x9750971d00fe2d196719fda8ce511ee817c334c2581a715790b302a9ce9bd5a3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:02Z), 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/UKDNQ1549349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc48b55fc2a8d8015f2a2c15881a84747c78fd26e0cd80c8805a0d2f1f7f6ba. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:15Z), 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/UKDNQ1549351.