Sandflow is a 1937 American Western film directed by Lesley Selander and written by Frances Guihan. The film stars Buck Jones, Lita Chevret, Bob Kortman, Arthur Aylesworth, Bob Terry and Enrique de Ro
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 0x3e9e403f93f0b4ec4916cad3d19744785da94eecd9f9fb85f4daee8edfbf4b08. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d3f2d90-7ca1-4519-bf41-db7acfc4caed.json and https://artists.proofprofile.net/proofs/artist/8d3f2d90-7ca1-4519-bf41-db7acfc4caed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).