thumb|Mintun portrait by Mark Alan Vieira, Stooky's Club Moderne, San Francisco, 2016 Peter Mintun (born 1950), is an American pianist and historian of American music of the 1920s.National Public Radi
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 0xd79d76bfdac4ee9e70fd82bf6917e8c3fc0f2f2fef305fe81772989593d8fd9d. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb0a27e5-e196-4d44-9fb3-f6e459eb11c0.json and https://artists.proofprofile.net/proofs/artist/cb0a27e5-e196-4d44-9fb3-f6e459eb11c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Deep Purple And Other Piano Solos From The 1920s And 1930s
Royal Society Jazz Orchestra: Harlem To Hollywood