Kei Itoh
type: MusicGroup
description: Kei Itoh is a Japanese pianist. Itoh graduated at the Tōhō Gakuen Daigaku in 1977, finishing her studies at the Salzburg Mozarteum and the Musikhochschule Hannover. She won the 1979 Epinal and 1983 M
popularity: 2
followers: 56
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ea519f3ed6e4231e5e7fe726667ca908c24a2a33eec9f792cbe3deeb20a15bc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e3d23ddf-6e16-47d5-8968-189ed5d29f4b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e3d23ddf-6e16-47d5-8968-189ed5d29f4b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e3d23ddf-6e16-47d5-8968-189ed5d29f4b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7ea519f3ed6e4231e5e7fe726667ca908c24a2a33eec9f792cbe3deeb20a15bc","name":"Kei Itoh","registered_at":"2026-06-21T07:37:34Z","symbol":"NIM1864477","token_address":"0x3754e0a406cec5cae02d580cc1553d78195ab312","type":"artist","uuid":"e3d23ddf-6e16-47d5-8968-189ed5d29f4b"}
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 0x7ea519f3ed6e4231e5e7fe726667ca908c24a2a33eec9f792cbe3deeb20a15bc. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3d23ddf-6e16-47d5-8968-189ed5d29f4b.json and https://artists.proofprofile.net/proofs/artist/e3d23ddf-6e16-47d5-8968-189ed5d29f4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x7ea519f3ed6e4231e5e7fe726667ca908c24a2a33eec9f792cbe3deeb20a15bc","name":"Kei Itoh","registered_at":"2026-06-21T07:37:34Z","symbol":"NIM1864477","token_address":"0x3754e0a406cec5cae02d580cc1553d78195ab312","type":"artist","uuid":"e3d23ddf-6e16-47d5-8968-189ed5d29f4b"}
album: ピアノ通信
  type: MusicAlbum
  date published: 2002-02-21
album: ブラームス & ラヴェル ピアノ協奏曲
  type: MusicAlbum
  date published: 2003-11-21
album: ショパン 24の前奏曲Op. 28, シューマン クライスレリアーナ Op. 16
  type: MusicAlbum
  date published: 2017-04-05