is a 2D action platform game developed by Thinking Rabbit for the Nintendo Entertainment System in 1988. The game features eight levels, and can be played by one or two players. It also features a la
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 0xa442817f72a526aeed7ac7f1d2c3606871f314a2f767785ae0fb77aca4d3c4ad. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ce58bdf-4180-4377-9d13-931b21242658.json and https://artists.proofprofile.net/proofs/artist/0ce58bdf-4180-4377-9d13-931b21242658.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).