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 0x89c9fda0608386e1ae280fd6709fd437811b2bc9ffb083dd163f8366df86af91. 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/af54d5a5-cef2-4edf-8c72-cbd4971a259c.json and https://artists.proofprofile.net/proofs/artist/af54d5a5-cef2-4edf-8c72-cbd4971a259c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ragtime Classics (Joseph Lamb's Ragtime Masterpieces)
Ragtime Classics (Scott Joplin's Ragtime Masterpieces)
Ragtime Classics (James Scott's Ragtime Masterpieces)
50 Ragtime Piano Classics (Best Of Scott Joplin, Joseph Lamb & James Scott)
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 0x088fcd604811395960d7dbea1f4f0bdb8f0e4ae62a87e90240610ff5f31498fc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA371246592.
Ultimate Ragtime Collection (The Greatest Ragtime Music)
The Ragtime Dixieland Playlist (Old Remastered Jazz Music Classics)
The Ragtime Dixieland Playlist, Vol. 1 (25 Old Remastered Jazz Music Classics)
The Ragtime Dixieland Playlist, Vol. 2 (25 Old Remastered Jazz Music Classics)