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 0x45d5981e9aaac1fdf143edfcedde96aa132af728268da59e3300f70fa5a6b935. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efc6ca68-f8e1-43a8-9938-bd5694f2df2c.json and https://artists.proofprofile.net/proofs/artist/efc6ca68-f8e1-43a8-9938-bd5694f2df2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Katherine & Hugh Colledge: Waggon Wheels for Violin
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 0x32a441463c52b3c585fa9d7847aa9ec8526ac5200245b96459af713b55d080cf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM82127455.
Katherine & Hugh Colledge: Stepping Stones for Cello
Katherine & Hugh Colledge: Shooting Stars for Cello
Katherine & Hugh Colledge: Stepping Stones for Violin
Katherine & Hugh Colledge: Shooting Stars for Violin
Katherine & Hugh Colledge: Stepping Stones for Viola
Katherine & Hugh Colledge: Waggon Wheels for Viola
Katherine & Hugh Colledge: Shooting Stars for Viola
Katherine & Hugh Colledge: Waggon Wheels for Cello
Katherine & Hugh Colledge: Fast Forward for Cello
Katherine & Hugh Colledge: Fast Forward for Violin
Katherine & Hugh Colledge: Fast Forward for Viola