Nathan Riddles (February 4, 1952 – August 11, 1991) was an American blues harmonica player based in New York City. Biography Riddles played as an accompanist with Larry Johnson, Screamin' Jay Hawkin
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519b6113ebf00db682f05210f18c66425d8dfac800ab64b793ab9c9d381edd35. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d6af285-5410-4b07-a9eb-5a3d68ff812d.json and https://artists.proofprofile.net/proofs/artist/5d6af285-5410-4b07-a9eb-5a3d68ff812d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).