Michael Keith may refer to: Michael Keith, 13th Earl of Kintore (1939–2004), Scottish peer and nobleman Michael C. Keith (born 1945), American media historian and author Michael Keith, musician in
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 0x8faeb85119955a5a9d79636bd220b5b4aa2e004352daf7fd277e2f27c8e88733. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c406703-931c-426e-b0f5-4dfad23d90aa.json and https://artists.proofprofile.net/proofs/artist/7c406703-931c-426e-b0f5-4dfad23d90aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).