双葉湊音
type: MusicGroup
genre: vocaloid
popularity: 8
followers: 884
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954555
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954555
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aeac50bf-da12-47b1-8c27-9f8e29d2d1c0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aeac50bf-da12-47b1-8c27-9f8e29d2d1c0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/aeac50bf-da12-47b1-8c27-9f8e29d2d1c0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T12:10:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa6e2522a8aaffbd8ba6616e843432e4f82385b1d406bb6a202816cf407db114a","name":"双葉湊音","registered_at":"2026-06-20T11:23:30Z","symbol":"NIM1600286","token_address":"0xb26ee1a8133908f6b5bbf67246de569465b7146d","type":"artist","uuid":"aeac50bf-da12-47b1-8c27-9f8e29d2d1c0"}
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 0xa6e2522a8aaffbd8ba6616e843432e4f82385b1d406bb6a202816cf407db114a. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeac50bf-da12-47b1-8c27-9f8e29d2d1c0.json and https://artists.proofprofile.net/proofs/artist/aeac50bf-da12-47b1-8c27-9f8e29d2d1c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0xa6e2522a8aaffbd8ba6616e843432e4f82385b1d406bb6a202816cf407db114a","name":"双葉湊音","registered_at":"2026-06-20T11:23:30Z","symbol":"NIM1600286","token_address":"0xb26ee1a8133908f6b5bbf67246de569465b7146d","type":"artist","uuid":"aeac50bf-da12-47b1-8c27-9f8e29d2d1c0"}
album: 夢ステージ
  type: MusicAlbum
  date published: 2023-02-01
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  type: MusicAlbum
  date published: 2023-07-31
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  type: MusicAlbum
  date published: 2023-08-05
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  type: MusicAlbum
  date published: 2024-02-02
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  type: MusicAlbum
  date published: 2024-06-28
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2024-11-01
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  type: MusicAlbum
  date published: 2025-01-24
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  type: MusicAlbum
  date published: 2025-03-05
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  type: MusicAlbum
  date published: 2025-03-27
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  type: MusicAlbum
  date published: 2025-05-16
album: 青の音に祝福を (Remix)
  type: MusicAlbum
  date published: 2025-07-07
album: 夏色サイダー
  type: MusicAlbum
  date published: 2025-09-07
track: 地獄猫ちゃん (feat. 双葉湊音)
  type: MusicRecording
  duration: PT2M43S
  duration ms: 163459
  explicit: false
  by artist: SLAVE.V-V-R
  by artist: 双葉湊音
  in album: The FICTIONER
    type: MusicAlbum
    date published: 2024-11-01
  isrc code: JP92Q2401221
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T18:55:06+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
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  additional property: OTSHash
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  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2401221
  additional property: OTSTimestamp
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    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 0x22bc18913a107cd4df2ca7b126b929d9cabf8fc80c67c13c4ed199312c61fad7. 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/JP92Q2401221.
    date published: 2026-07-08T03:20:19Z
  audio: 地獄猫ちゃん (feat. 双葉湊音)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.115
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.052
    additional property: Acousticness
      type: PropertyValue
      value: 0.812
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.116
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.642
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.965
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: 水中イノセントベール (feat. 双葉湊音)
  type: MusicRecording
  duration: PT3M49S
  duration ms: 229350
  explicit: false
  by artist: irucaice
  by artist: 双葉湊音
  in album: iceQuarium -Cotton Candy-
    type: MusicAlbum
    date published: 2024-09-25
  genre: vocaloid
  isrc code: JPA652306244
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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    type: PropertyValue
    value: 2026-07-06T18:42:45+00:00
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA652306244
  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
  audio: 水中イノセントベール (feat. 双葉湊音)

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45157e00e2655492bad63200408b146f119f7efe5401fc813d30109e3b06e0d4. 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/JPA652306244.
date published: 2026-07-08T03:20:19Z

水中イノセントベール (feat. 双葉湊音)
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additional property: Tempo (BPM)
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  value: 124.795
additional property: Musical Key
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additional property: Mode (Major/Minor)
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  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
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  value: 0.672
additional property: Energy
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additional property: Speechiness
  type: PropertyValue
  value: 0.032
additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
  type: PropertyValue
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additional property: Valence (Positivity)
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  value: 0.883
additional property: Loudness (dB)
  type: PropertyValue
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additional property: Key Name
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additional property: Mode Name
  type: PropertyValue
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