F-Man is a 1936 American comedy film directed by Edward F. Cline and written by Richard Connell, Henry Johnson, Paul Gerard Smith and Eddie Welch. The film stars Jack Haley, William Frawley, Grace Bra
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 0x9d48916602e8bce3ec04f6d19017934461d6dfe025dc9f2d43de23e966f06ad1. 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/6f8f3e6b-152b-484a-a7e6-a315d9cd3acf.json and https://artists.proofprofile.net/proofs/artist/6f8f3e6b-152b-484a-a7e6-a315d9cd3acf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).