RIKUO
type: MusicGroup
description: Rikuo or Rikuō may refer to: Mutsu Province (1868), also called , an old province of Japan , an old motorcycle manufacturing company in Japan Rikuo (Darkstalkers), a fictional character from the v
popularity: 6
followers: 1027
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0ab99f4de1e6c8cfa639daae166b1a1ebbbc40a8e36d545d283912854df28963
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9427054-dbe1-496b-9e33-67a65e78383b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f9427054-dbe1-496b-9e33-67a65e78383b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f9427054-dbe1-496b-9e33-67a65e78383b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
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 0x0ab99f4de1e6c8cfa639daae166b1a1ebbbc40a8e36d545d283912854df28963. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9427054-dbe1-496b-9e33-67a65e78383b.json and https://artists.proofprofile.net/proofs/artist/f9427054-dbe1-496b-9e33-67a65e78383b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
album: アイノウタ
  type: MusicAlbum
  date published: 2008-06-25
album: アイノウタ
  type: MusicAlbum
  date published: 2008-06-25
album: What's Love?
  type: MusicAlbum
  date published: 2008-08-06
album: What's Love?
  type: MusicAlbum
  date published: 2008-08-06
album: リクオ&ピアノ
  type: MusicAlbum
  date published: 2010-01-20
album: HOBO HOUSE
  type: MusicAlbum
  date published: 2014-02-21
album: HOBO HOUSE
  type: MusicAlbum
  date published: 2014-02-21
album: Hello!
  type: MusicAlbum
  date published: 2016-04-14
album: Hello!
  type: MusicAlbum
  date published: 2016-04-14
album: Rikuo & Piano
  type: MusicAlbum
  date published: 2017-11-01
album: Rock'n Roll Goes On / Umi sakura
  type: MusicAlbum
  date published: 2018-05-10
album: オマージュ - ブルーハーツが聴こえる
  type: MusicAlbum
  date published: 2019-04-15
album: Homage
  type: MusicAlbum
  date published: 2019-04-15
album: Gradation World ~ Living In This Color Gradient World ~
  type: MusicAlbum
  date published: 2019-05-01
album: グラデーション・ワールド
  type: MusicAlbum
  date published: 2019-05-01
album: Gradation World Live
  type: MusicAlbum
  date published: 2020-01-11
album: Gradation World Live
  type: MusicAlbum
  date published: 2020-01-11
album: Rikuo&Piano2
  type: MusicAlbum
  date published: 2021-09-10
album: リクオ＆ピアノ２
  type: MusicAlbum
  date published: 2021-09-10
album: Real
  type: MusicAlbum
  date published: 2024-06-05
album: リアル
  type: MusicAlbum
  date published: 2024-06-05
track: アミーゴ
  type: MusicRecording
  duration: PT4M57S
  duration ms: 297793
  explicit: false
  by artist: RIKUO
  by artist: 中川敬
  by artist: ウルフルケイスケ
  in album: SONGS OF Ishiyan
    type: MusicAlbum
    date published: 2019-07-24
  isrc code: JPU801900059
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T08:19:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x34cb1bb3ff060ddd5fe2fd031074e8c3c06fc0835272078c0df02afdb20163f7
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU801900059
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x34cb1bb3ff060ddd5fe2fd031074e8c3c06fc0835272078c0df02afdb20163f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU801900059.
    date published: 2026-07-08T03:20:19Z
  audio: アミーゴ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 150.686
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.463
    additional property: Energy
      type: PropertyValue
      value: 0.949
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.045
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.081
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.752
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.112
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major