大河内涼子
type: MusicGroup
popularity: 10
followers: 88
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x01c77d833db7bfce845e52cfc8ea354d036c8e31a60c49fb0c7f0d1382323f80
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ded1f47-678a-4690-b139-750fd2280cbe.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ded1f47-678a-4690-b139-750fd2280cbe.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7ded1f47-678a-4690-b139-750fd2280cbe
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x01c77d833db7bfce845e52cfc8ea354d036c8e31a60c49fb0c7f0d1382323f80","name":"大河内涼子","registered_at":"2026-06-17T09:29:19Z","symbol":"NIM1352858","token_address":"0xbcdf4069bd1ac9bf84e2c97c2bc8d476e7db95fa","type":"artist","uuid":"7ded1f47-678a-4690-b139-750fd2280cbe"}
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 0x01c77d833db7bfce845e52cfc8ea354d036c8e31a60c49fb0c7f0d1382323f80. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ded1f47-678a-4690-b139-750fd2280cbe.json and https://artists.proofprofile.net/proofs/artist/7ded1f47-678a-4690-b139-750fd2280cbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0x01c77d833db7bfce845e52cfc8ea354d036c8e31a60c49fb0c7f0d1382323f80","name":"大河内涼子","registered_at":"2026-06-17T09:29:19Z","symbol":"NIM1352858","token_address":"0xbcdf4069bd1ac9bf84e2c97c2bc8d476e7db95fa","type":"artist","uuid":"7ded1f47-678a-4690-b139-750fd2280cbe"}
album: 大河内涼子オリジナル作品集
  type: MusicAlbum
  date published: 2023-03-04
track: エルガー: 朝の歌 作品15-2
  type: MusicRecording
  duration: PT2M29S
  duration ms: 149000
  explicit: false
  by artist: 大河内涼子
  in album: 朝のクラシック -爽やかな目覚めのためのクラシック名曲選-
    type: MusicAlbum
    date published: 2021-12-01
  isrc code: JPW792139709
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-18T23:59:43+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xffd007078f4b2661d3768b1ffbef265b23471519bc667a7549e117be5140993b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW792139709
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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 0xffd007078f4b2661d3768b1ffbef265b23471519bc667a7549e117be5140993b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW792139709.
    date published: 2026-07-02T03:30:09Z
  audio: エルガー: 朝の歌 作品15-2
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 116.907
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.231
    additional property: Energy
      type: PropertyValue
      value: 0.283
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.922
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.007
    additional property: Liveness
      type: PropertyValue
      value: 0.108
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.216
    additional property: Loudness (dB)
      type: PropertyValue
      value: -14.886
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: エルガー: 愛の挨拶 作品12
  type: MusicRecording
  duration: PT2M18S
  duration ms: 138683
  explicit: false
  by artist: 大河内涼子
  in album: 朝のクラシック -爽やかな目覚めのためのクラシック名曲選-
    type: MusicAlbum
    date published: 2021-12-01
  isrc code: JPW792139708
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-19T00:04:36+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x57e2f26c71c89f4427bcec4a55291bd1810dbf94cf40ac9baf3eca335df196f4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW792139708
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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 0x57e2f26c71c89f4427bcec4a55291bd1810dbf94cf40ac9baf3eca335df196f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW792139708.
    date published: 2026-07-02T03:30:09Z
  audio: エルガー: 愛の挨拶 作品12
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.938
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.239
    additional property: Energy
      type: PropertyValue
      value: 0.266
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.906
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.103
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.166
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Loudness (dB)
type: PropertyValue
value: -15.105

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Major