Howard Armstrong may refer to: Howard Armstrong (musician) (1909–2003), country blues musician Howard Armstrong (baseball) (1889–1926), baseball player Howard E. Armstrong (1903–1983), Vermont Secreta
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 0xd5024fcf9fb67bab0e72b5d14d01b058a46b6f64eeb48f35e6e9c1d15911260b. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd76ed2d-7de3-4c1e-941b-8d380c9f60c5.json and https://artists.proofprofile.net/proofs/artist/fd76ed2d-7de3-4c1e-941b-8d380c9f60c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).