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 0x1a0ce48e4134773cfcbab69021833b08985345873135469327fedf718aaee0b0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cce133a-6299-430a-99a8-1b75979b6156.json and https://artists.proofprofile.net/proofs/artist/9cce133a-6299-430a-99a8-1b75979b6156.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Fireman's Ball, Pt. 1 (Mono Version)
The Fireman's Ball, Pt. 2 (Mono Version)
Portuguese Washerwomen / Lucky Pierre (Mono Version)
Loco-Motion / Brazilian Hobo (Mono Version)
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 0xc7e7d209bf8ba366dcb65f537e0cbbe855f01e770a08d6dd0d9225c3d20ea54d. 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/AUXN22495438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32ab996f0c1e911fe9bb4761ca91db600c9e050921fb51fda50cf90fb761c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUXN22495443.
The World's Greatest Ragtime Piano Player
Joe Fingers Carr Gold - Original Vintage Recordings
Les Idoles Américaines Du Jazz: Joe "Fingers" Carr & Pee Wee Hunt, Vol. 1