NightSky is an indie puzzle-platformer video game developed by Nifflas and published by Nicalis. It was released on March 1, 2011 for Windows, followed by a September 1, 2012 release for MacOS and Lin
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 0xd6e650b8df26ae4fc0f3b2e195fd51e09c5587898b948ebfa7257e677b081a6a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16d8d024-bdc7-4595-8688-49bcf2709481.json and https://artists.proofprofile.net/proofs/artist/16d8d024-bdc7-4595-8688-49bcf2709481.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).