Space Cowboys is a 2000 American adventure drama film directed and produced by Clint Eastwood. It stars Eastwood, Tommy Lee Jones, Donald Sutherland, and James Garner as four aging former test pilots
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ab0805fcbea543755f139e60e628596be9f5a756358f07342e19a1edf5eed5. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e5eb6f3-32ab-46e3-9a98-2ffa4ae9b1e2.json and https://artists.proofprofile.net/proofs/artist/9e5eb6f3-32ab-46e3-9a98-2ffa4ae9b1e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).