阪田知樹
type: MusicGroup
genre: classical piano
popularity: 7
followers: 284
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8067a26ae9da30d3f5b3da7017369f1d6ff7e0c7007751b7b90559ab766463fc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954134
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954134
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fa19e5f-879b-4b23-96a9-d6a6aea723e9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fa19e5f-879b-4b23-96a9-d6a6aea723e9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7fa19e5f-879b-4b23-96a9-d6a6aea723e9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:41:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8067a26ae9da30d3f5b3da7017369f1d6ff7e0c7007751b7b90559ab766463fc","name":"阪田知樹","registered_at":"2026-06-17T09:59:18Z","symbol":"NIM1360020","token_address":"0x66a1cceaf4cfabbe2872c3890330e0b1c04948b7","type":"artist","uuid":"7fa19e5f-879b-4b23-96a9-d6a6aea723e9"}
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 0x8067a26ae9da30d3f5b3da7017369f1d6ff7e0c7007751b7b90559ab766463fc. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fa19e5f-879b-4b23-96a9-d6a6aea723e9.json and https://artists.proofprofile.net/proofs/artist/7fa19e5f-879b-4b23-96a9-d6a6aea723e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:41:05Z
  text: {"copyright_id":"0x8067a26ae9da30d3f5b3da7017369f1d6ff7e0c7007751b7b90559ab766463fc","name":"阪田知樹","registered_at":"2026-06-17T09:59:18Z","symbol":"NIM1360020","token_address":"0x66a1cceaf4cfabbe2872c3890330e0b1c04948b7","type":"artist","uuid":"7fa19e5f-879b-4b23-96a9-d6a6aea723e9"}
album: スペイン狂詩曲～阪田知樹デビュー！
  type: MusicAlbum
  date published: 2015-06-17
album: スペイン狂詩曲～阪田知樹デビュー！
  type: MusicAlbum
  date published: 2015-06-17
  track: ピアノ・ソナタ 第 3番 ロ短調, 作品 58: 1. Allegro maestoso
    type: MusicRecording
    duration: PT9M7S
    duration ms: 547560
    explicit: false
    by artist: 阪田知樹
    in album: スペイン狂詩曲～阪田知樹デビュー！
      type: MusicAlbum
      date published: 2015-06-17
    genre: classical piano
    isrc code: JPG201517846
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T14:09:01+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x89113b3099ef6b65f25bb98e37e4aa668980aa5ae7c76124050f49a20101dc05
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958428
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958428
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201517846
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T15:15:14Z
    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 0x89113b3099ef6b65f25bb98e37e4aa668980aa5ae7c76124050f49a20101dc05. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPG201517846.
      date published: 2026-07-17T15:15:14Z
    audio: ピアノ・ソナタ 第 3番 ロ短調, 作品 58: 1. Allegro maestoso
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.942
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.252
      additional property: Energy
        type: PropertyValue
        value: 0.076
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.986
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.883
      additional property: Liveness
        type: PropertyValue
        value: 0.148
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.102
      additional property: Loudness (dB)
        type: PropertyValue
        value: -24.732
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: ピアノ・ソナタ 第 3番 ロ短調, 作品 58: 4. Finale. Presto, non tanto
    type: MusicRecording
    duration: PT5M16S
    duration ms: 316373
    explicit: false
    by artist: 阪田知樹
    in album: スペイン狂詩曲～阪田知樹デビュー！
      type: MusicAlbum
      date published: 2015-06-17
    genre: classical piano
    isrc code: JPG201517849
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T14:03:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdaee07f4ce6f0db27351b69a6aceba0139a52f93a9336007d233da9c23b1c6bf
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958428
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958428
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG201517849
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T15:15:14Z
    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 0xdaee07f4ce6f0db27351b69a6aceba0139a52f93a9336007d233da9c23b1c6bf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPG201517849.
      date published: 2026-07-17T15:15:14Z
    audio: ピアノ・ソナタ 第 3番 ロ短調, 作品 58: 4. Finale. Presto, non tanto
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 118.975
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.31
      additional property: Energy
        type: PropertyValue
        value: 0.247
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.97
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.894
      additional property: Liveness
        type: PropertyValue
        value: 0.102
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: イリュージョンズ

Valence (Positivity)
type: PropertyValue
value: 0.249

Loudness (dB)
type: PropertyValue
value: -20.064

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

イリュージョンズ
type: MusicAlbum
date published: 2020-03-17