Not a Hero is a 2015 shooter video game developed by Roll7 and published by Devolver Digital for Windows. It was released on OS X and Linux on 1 October 2015 and PlayStation 4 on 2 February 2016, with
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 0x8897e5ac73c02e0429a1ec61e24d2bb3d0994873832f5e1dbb32989d8f34c1d3. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17190851-5366-437e-989d-13203e8e0001.json and https://artists.proofprofile.net/proofs/artist/17190851-5366-437e-989d-13203e8e0001.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).