Patman may refer to: Mr. Patman, 1981 film directed by John Guillermin Robinson–Patman Act of 1936, a United States federal law that prohibits anticompetitive practices, William Neff Patman, (1927–20
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 0xc6c5f40e7217e5e6b507740098f45085cb21c4e1058e92ca6e469bd33ae51ca2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df1ba39-4c47-4aeb-a68c-ce8fe07a233d.json and https://artists.proofprofile.net/proofs/artist/4df1ba39-4c47-4aeb-a68c-ce8fe07a233d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).