AI ICHIKAWA
type: MusicGroup
genre: city pop
genre: shibuya-kei
popularity: 8
followers: 1194
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953846
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953846
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/00fad1b1-d639-465a-b5b8-b9d81f991dc6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/00fad1b1-d639-465a-b5b8-b9d81f991dc6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/00fad1b1-d639-465a-b5b8-b9d81f991dc6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:48:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5656dbb465b92a674874bebc8775b64c252529d9af6564a7b3e57ab9f216d4ef","name":"AI ICHIKAWA","registered_at":"2026-06-15T13:50:31Z","symbol":"NIM0727935","token_address":"0x7e13ad49c041300149947f8075be73deb95bc3d3","type":"artist","uuid":"00fad1b1-d639-465a-b5b8-b9d81f991dc6"}
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 0x5656dbb465b92a674874bebc8775b64c252529d9af6564a7b3e57ab9f216d4ef. Chain 2 (Bitcoin): anchored in block 953847 (2026-06-15T22:51:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00fad1b1-d639-465a-b5b8-b9d81f991dc6.json and https://artists.proofprofile.net/proofs/artist/00fad1b1-d639-465a-b5b8-b9d81f991dc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:51:00Z
  text: {"copyright_id":"0x5656dbb465b92a674874bebc8775b64c252529d9af6564a7b3e57ab9f216d4ef","name":"AI ICHIKAWA","registered_at":"2026-06-15T13:50:31Z","symbol":"NIM0727935","token_address":"0x7e13ad49c041300149947f8075be73deb95bc3d3","type":"artist","uuid":"00fad1b1-d639-465a-b5b8-b9d81f991dc6"}
album: The Standards I've met
  type: MusicAlbum
  date published: 2012-10-17
album: Haven't we met
  type: MusicAlbum
  date published: 2013-10-02
album: I WANT YOU TO WANT ME
  type: MusicAlbum
  date published: 2014-07-09
album: MY LOVE, WITH MY SHORT HAIR
  type: MusicAlbum
  date published: 2018-04-11
album: MY LOVE, WITH MY SHORT HAIR
  type: MusicAlbum
  date published: 2018-04-11
album: Blue
  type: MusicAlbum
  date published: 2018-12-20
album: Vibration/Yours
  type: MusicAlbum
  date published: 2019-10-18
album: Circle
  type: MusicAlbum
  date published: 2020-08-10
album: Simpler Life
  type: MusicAlbum
  date published: 2020-08-10
album: ひとにぎりの未来と憂鬱
  type: MusicAlbum
  date published: 2021-06-14
album: 真夜中のドア Stay with me
  type: MusicAlbum
  date published: 2021-07-07
album: I want to hold your hand
  type: MusicAlbum
  date published: 2021-08-27
album: Photograph Lover/真夏の奇蹟
  type: MusicAlbum
  date published: 2022-05-20
album: じれったい
  type: MusicAlbum
  date published: 2023-02-14
album: Melting Time
  type: MusicAlbum
  date published: 2025-04-21
track: PAPER DOLL

PAPER DOLL
type: MusicRecording
duration: PT2M37S
duration ms: 157933
explicit: false
by artist: monolog
by artist: AI ICHIKAWA
in album: TWILIGHT TIME
  type: MusicAlbum
  date published: 2022-06-15
popularity: 15
isrc code: JPR771300196
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-23T06:07:15+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2b190a8dc633165860a89826dca2af2868f7b89ce4048061d5412c204c3706a5
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR771300196
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b190a8dc633165860a89826dca2af2868f7b89ce4048061d5412c204c3706a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPR771300196.
  date published: 2026-07-02T05:09:12Z
audio: PAPER DOLL
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.725
  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: 0.854
  additional property: Energy
    type: PropertyValue
    value: 0.662
  additional property: Speechiness
    type: PropertyValue
    value: 0.095
  additional property: Acousticness
    type: PropertyValue
    value: 0.136
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.112
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.952
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.937
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major