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 0xd11e14ba7f1a381afcc4d78f64d0bb359d3dc84b640cf0ba46c01f2be2403e41. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1588d4ae-fd38-4682-82c0-d0c1397ee0b2.json and https://artists.proofprofile.net/proofs/artist/1588d4ae-fd38-4682-82c0-d0c1397ee0b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ragtime Piano Unsung Heroes - The Best Of Joseph Lamb
Ragtime: The Complete Works Of Scott Joplin
Ragtime: The World's Greatest Ragtime Album
Scott Joplin Ragtime Masterworks (Vol. 2)
Scott Joplin Ragtime Masterworks (Vol. 3)
Scott Joplin Ragtime Masterworks (Vol. 1)