was a Japanese corporation that developed and published games for the Game Boy, Famicom, the Super Famicom, and the Sega Mega Drive during the 1980s and the 1990s. It was founded in 1986 and closed 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f284a6970f1e48e11487b4f836c85d0df28a213e21c956c094f06dbf686672. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a76f8cc5-67b8-4f23-b244-4ffc40ff92fe.json and https://artists.proofprofile.net/proofs/artist/a76f8cc5-67b8-4f23-b244-4ffc40ff92fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).