Katsuya Watanabe
type: MusicGroup
genre: chamber music
popularity: 2
followers: 138
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xca77e3225576ea754ac148ab7b75705c98cf54a511232acd8bf873d974d9f785
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/72386457-4558-4eae-bd94-9edb2f965622.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/72386457-4558-4eae-bd94-9edb2f965622.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/72386457-4558-4eae-bd94-9edb2f965622
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xca77e3225576ea754ac148ab7b75705c98cf54a511232acd8bf873d974d9f785","name":"Katsuya Watanabe","registered_at":"2026-06-17T05:23:59Z","symbol":"NIM1294384","token_address":"0x60bf4c17d768f9f8cfbdaee2ec9b9319503ed4b6","type":"artist","uuid":"72386457-4558-4eae-bd94-9edb2f965622"}
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 0xca77e3225576ea754ac148ab7b75705c98cf54a511232acd8bf873d974d9f785. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72386457-4558-4eae-bd94-9edb2f965622.json and https://artists.proofprofile.net/proofs/artist/72386457-4558-4eae-bd94-9edb2f965622.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xca77e3225576ea754ac148ab7b75705c98cf54a511232acd8bf873d974d9f785","name":"Katsuya Watanabe","registered_at":"2026-06-17T05:23:59Z","symbol":"NIM1294384","token_address":"0x60bf4c17d768f9f8cfbdaee2ec9b9319503ed4b6","type":"artist","uuid":"72386457-4558-4eae-bd94-9edb2f965622"}
album: Oboe Recital: Watanabe, Katsuya - Alwyn, W. / Kalliwoda, J.W. / Dutilleux, H. / Rota, N. / Pasculli, A. (Impression)
  type: MusicAlbum
  date published: 2008-09-30
album: Oboe Recital: Watanabe, Katsuya - Alwyn, W. / Kalliwoda, J.W. / Dutilleux, H. / Rota, N. / Pasculli, A. (Impression)
  type: MusicAlbum
  date published: 2008-09-30
album: Summer Song
  type: MusicAlbum
  date published: 2010-10-26
album: Summer Song
  type: MusicAlbum
  date published: 2010-10-26
album: Poem
  type: MusicAlbum
  date published: 2014-03-01
album: Poem
  type: MusicAlbum
  date published: 2014-03-01
album: Romance
  type: MusicAlbum
  date published: 2014-09-02
album: Romance
  type: MusicAlbum
  date published: 2014-09-02
album: Pastorale
  type: MusicAlbum
  date published: 2016-10-07
album: Pastorale
  type: MusicAlbum
  date published: 2016-10-07
album: Takemitsu: Wings
  type: MusicAlbum
  date published: 2018-06-15
album: Takemitsu: Wings
  type: MusicAlbum
  date published: 2018-06-15
album: Cantabile
  type: MusicAlbum
  date published: 2021-10-01
album: Cantabile
  type: MusicAlbum
  date published: 2021-10-01