nyan_kos
type: MusicGroup
genre: hyperpop
popularity: 11
followers: 295
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa0ed8249fadb84640dcee5cf46f72f12de7cab6e999b2a3d22b2ac63ec8a9510
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953697
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953697
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6351c3f6-6330-44cd-ba52-fca65b4737da.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6351c3f6-6330-44cd-ba52-fca65b4737da.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6351c3f6-6330-44cd-ba52-fca65b4737da
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:49:28Z
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 0xa0ed8249fadb84640dcee5cf46f72f12de7cab6e999b2a3d22b2ac63ec8a9510. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6351c3f6-6330-44cd-ba52-fca65b4737da.json and https://artists.proofprofile.net/proofs/artist/6351c3f6-6330-44cd-ba52-fca65b4737da.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T21:49:28Z
album: change my days
  type: MusicAlbum
  date published: 2022-11-09
album: デート終了5分前！ (feat. Fantôme)
  type: MusicAlbum
  date published: 2024-02-03
  track: デート終了5分前！ (feat. Fantôme)
    type: MusicRecording
    duration: PT2M40S
    duration ms: 160010
    explicit: false
    by artist: nyan_kos
    in album: デート終了5分前！ (feat. Fantôme)
      type: MusicAlbum
      date published: 2024-02-03
    genre: hyperpop
    isrc code: TCJPY2488191
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T18:19:05+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x00648cb33df3a29c0e57b1d851252884f25ffd486d66d748207f93654e3f76de
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958194
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958194
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2488191
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T20:32:27Z
    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 0x00648cb33df3a29c0e57b1d851252884f25ffd486d66d748207f93654e3f76de. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2488191 — a six-check JSON result.
      date published: 2026-07-15T20:32:27Z
    audio: デート終了5分前！ (feat. Fantôme)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 160.003
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.467
      additional property: Energy
        type: PropertyValue
        value: 0.774
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.164
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.07
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.549
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.519
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 5minutes before the date ends!! (feat. Fantôme)
  type: MusicAlbum
  date published: 2024-02-03
album: NonFiction (feat. ryu_no & traboi)
  type: MusicAlbum
  date published: 2024-02-10
album: NonFiction (feat. ryu_no & traboi)
  type: MusicAlbum
  date published: 2024-02-10
album: 身体だけってわかってたのに。 (feat. Arunyq)
  type: MusicAlbum
  date published: 2024-03-14
  track: 身体だけってわかってたのに。 (feat. Arunyq)
    type: MusicRecording
    duration: PT1M47S
    duration ms: 107869
    explicit: false
    by artist: nyan_kos
    in album: 身体だけってわかってたのに。 (feat. Arunyq)
      type: MusicAlbum
      date published: 2024-03-14
    genre: hyperpop
    isrc code: TCJPZ2417006
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T04:29:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc98629ec6ac2128fafa254520164c568545be757b245b1af86b9b81db3ec5729
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958825
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958825
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPZ2417006
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T04:55:29Z
    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 0xc98629ec6ac2128fafa254520164c568545be757b245b1af86b9b81db3ec5729. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPZ2417006 — a six-check JSON result.
      date published: 2026-07-20T04:55:29Z
    audio: 身体だけってわかってたのに。 (feat. Arunyq)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.041
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.599
      additional property: Energy
        type: PropertyValue
        value: 0.65
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: knew it was just my body (feat. Arunyq)
album: Fake one (feat. traboi)
album: lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
album: If the cat and the dragon jointly produce an E P.
album: もしも猫と龍が共同制作でEPを出したら。
album: ろりーたわんだーらんど。 (speed up)
album: Lolita wonderland (speed up)
album: Night Escape
album: キミしょほーせん！
album: You are prescription!
album: dust box
album: 嘘＋毒edition
album: doubt & poison edition
album: road star

Acousticness
type: PropertyValue
value: 0.425

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.105

Valence (Positivity)
type: PropertyValue
value: 0.748

Loudness (dB)
type: PropertyValue
value: -7.316

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

knew it was just my body (feat. Arunyq)
type: MusicAlbum
date published: 2024-03-14

Fake one (feat. traboi)
type: MusicAlbum
date published: 2024-04-01

Fake one (feat. traboi)
type: MusicAlbum
date published: 2024-04-01

lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
type: MusicAlbum
date published: 2024-05-18

lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
type: MusicAlbum
date published: 2024-05-18
track: lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
  type: MusicRecording
  duration: PT3M2S
  duration ms: 182808
  explicit: false
  by artist: nyan_kos
  in album: lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
    type: MusicAlbum
    date published: 2024-05-18
  genre: hyperpop
  isrc code: TCJPA2427713
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T06:37:27+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd0d8c250195ff7a1a1de023da674944134202d1eaa4b81533853e5edc6d97cb0
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956474
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956474
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPA2427713
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T08:56:35Z
  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 0xd0d8c250195ff7a1a1de023da674944134202d1eaa4b81533853e5edc6d97cb0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPA2427713 — a six-check JSON result.
    date published: 2026-07-03T08:56:35Z
  audio: lovely magic (feat. z², Arunyq, iyan D1KE & Fantôme)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 169.955
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.509
    additional property: Energy
      type: PropertyValue
      value: 0.792
    additional property: Speechiness
      type: PropertyValue
      value: 0.039
    additional property: Acousticness
      type: PropertyValue
      value: 0.185
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.268
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.806
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.694
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major

If the cat and the dragon jointly produce an E P.
type: MusicAlbum
date published: 2024-08-17

もしも猫と龍が共同制作でEPを出したら。
type: MusicAlbum
date published: 2024-08-17

ろりーたわんだーらんど。 (speed up)
type: MusicAlbum
date published: 2024-08-31

Lolita wonderland (speed up)
type: MusicAlbum
date published: 2024-08-31

Night Escape
type: MusicAlbum
date published: 2024-09-19

Night Escape
type: MusicAlbum
date published: 2024-09-19

キミしょほーせん！
type: MusicAlbum
date published: 2024-10-25

You are prescription!
type: MusicAlbum
date published: 2024-10-25

dust box
type: MusicAlbum
date published: 2025-01-24

dust box
type: MusicAlbum
date published: 2025-01-24

嘘＋毒edition
type: MusicAlbum
date published: 2025-03-08

doubt & poison edition
type: MusicAlbum
date published: 2025-03-08

road star
type: MusicAlbum
date published: 2025-07-09

road star
type: MusicAlbum
date published: 2025-07-09