Recca is a 1992 scrolling shooter video game developed by KID and published by Naxat Soft for the Family Computer. Controlling the titular space fighter craft, the player is sent to counterattack an i
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 0x181b7e7e6de6a249a02387f0b97f0b2c1a3392f2a0ff49e92319b011ad0f5a7a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a0f5f7f-5c92-4b07-8c4e-2d3559dad6b1.json and https://artists.proofprofile.net/proofs/artist/8a0f5f7f-5c92-4b07-8c4e-2d3559dad6b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).