Koichi Nakamura
type: MusicGroup
description: is a Japanese video game designer. Nakamura gained fame as a programming prodigy while still in high school; in 1982, he entered Enix's first national programming contest and claimed runner-up prize
popularity: 3
followers: 657
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x475e63679bc75da1db5496749a58ed5a880464c7cbb07ca490ed1d2fe040ed0d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9a66db85-3edb-403f-8fa2-3c297dc2ca62.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9a66db85-3edb-403f-8fa2-3c297dc2ca62.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9a66db85-3edb-403f-8fa2-3c297dc2ca62
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x475e63679bc75da1db5496749a58ed5a880464c7cbb07ca490ed1d2fe040ed0d","name":"Koichi Nakamura","registered_at":"2026-06-17T19:29:13Z","symbol":"NIM1495928","token_address":"0x6ba53e3671f12c920925fe7d3de7d373e50a96db","type":"artist","uuid":"9a66db85-3edb-403f-8fa2-3c297dc2ca62"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475e63679bc75da1db5496749a58ed5a880464c7cbb07ca490ed1d2fe040ed0d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a66db85-3edb-403f-8fa2-3c297dc2ca62.json and https://artists.proofprofile.net/proofs/artist/9a66db85-3edb-403f-8fa2-3c297dc2ca62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x475e63679bc75da1db5496749a58ed5a880464c7cbb07ca490ed1d2fe040ed0d","name":"Koichi Nakamura","registered_at":"2026-06-17T19:29:13Z","symbol":"NIM1495928","token_address":"0x6ba53e3671f12c920925fe7d3de7d373e50a96db","type":"artist","uuid":"9a66db85-3edb-403f-8fa2-3c297dc2ca62"}
album: かけがえのないもの
  type: MusicAlbum
  date published: 2014-01-29
album: Great Japanese Songs
  type: MusicAlbum
  date published: 2014-01-29
album: かけがえのないもの
  type: MusicAlbum
  date published: 2014-01-29
album: Hope for tomorrow
  type: MusicAlbum
  date published: 2021-04-24
album: Hope for tomorrow
  type: MusicAlbum
  date published: 2021-04-24
album: Chosen/選ばれし者
  type: MusicAlbum
  date published: 2024-10-04
album: Chosen
  type: MusicAlbum
  date published: 2024-10-04
album: 『はじまりの日』オリジナルサウンドトラック
  type: MusicAlbum
  date published: 2024-10-05
album: A DAY BEGINS Original Sound Track
  type: MusicAlbum
  date published: 2024-10-05