Nobutaka Okubo
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 2
followers: 284
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5d5a39fee976dcef9f856237bc3b2fbe6e1d721fe82bf770b9c9969a0ec41d14
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953972
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953972
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2abf7133-3805-4b16-8de7-7a80a8e16a82.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2abf7133-3805-4b16-8de7-7a80a8e16a82.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2abf7133-3805-4b16-8de7-7a80a8e16a82
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:31:10Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5d5a39fee976dcef9f856237bc3b2fbe6e1d721fe82bf770b9c9969a0ec41d14","name":"Nobutaka Okubo","registered_at":"2026-06-16T04:25:03Z","symbol":"NIM0936672","token_address":"0x765904787e0622aa2ee8f02a53c6230a916a3cc9","type":"artist","uuid":"2abf7133-3805-4b16-8de7-7a80a8e16a82"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5a39fee976dcef9f856237bc3b2fbe6e1d721fe82bf770b9c9969a0ec41d14. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2abf7133-3805-4b16-8de7-7a80a8e16a82.json and https://artists.proofprofile.net/proofs/artist/2abf7133-3805-4b16-8de7-7a80a8e16a82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x5d5a39fee976dcef9f856237bc3b2fbe6e1d721fe82bf770b9c9969a0ec41d14","name":"Nobutaka Okubo","registered_at":"2026-06-16T04:25:03Z","symbol":"NIM0936672","token_address":"0x765904787e0622aa2ee8f02a53c6230a916a3cc9","type":"artist","uuid":"2abf7133-3805-4b16-8de7-7a80a8e16a82"}
album: 想
  type: MusicAlbum
  date published: 2004-01-28
album: 響
  type: MusicAlbum
  date published: 2004-03-24
album: FlightNightParty
  type: MusicAlbum
  date published: 2009-02-20
album: Flight Night Party2
  type: MusicAlbum
  date published: 2011-12-09
album: progress
  type: MusicAlbum
  date published: 2013-09-18
album: Time
  type: MusicAlbum
  date published: 2021-05-16
album: 歌うたいのバラッド
  type: MusicAlbum
  date published: 2022-02-05