Harry Peter "Happy" Traum (May 9, 1938 – July 17, 2024) was an American folk musician who started playing around Washington Square in the late 1950s. He became a stalwart of the Greenwich Village musi
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 0xe68f64de13291ea0d1c5d50d71a1829c96f020e96d5c077f6fd41dfee8925e7a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd30f9a-f059-4b90-94cd-de9cce0a2a47.json and https://artists.proofprofile.net/proofs/artist/cdd30f9a-f059-4b90-94cd-de9cce0a2a47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).