is a 2D fighting game developed by Dimps and first published by Sammy for the Atomiswave arcade platform in 2004, and was later ported by Sega to the Sony PlayStation 2 on March 17, 2005. In 2020, a
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 0x009a577ad00540421b2432dfc085383a92b0d8b110759abf5f5dfbd7c1f16a11. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c9cba41-520f-45f1-abe2-9be9593a819c.json and https://artists.proofprofile.net/proofs/artist/0c9cba41-520f-45f1-abe2-9be9593a819c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).