Alan Walbridge Ladd (September 3, 1913 – January 29, 1964) was an American actor and film producer. Ladd found success in film in the 1940s and early 1950s, particularly in films noir and Westerns. He
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 0xda5f0831679fd343bf946639051c1af61a3d2ab676bbd1499ef3207e72ea024b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d8a9725-9aca-43dd-a5b7-b8a3100d4148.json and https://artists.proofprofile.net/proofs/artist/4d8a9725-9aca-43dd-a5b7-b8a3100d4148.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).