MEWCATUNE
type: MusicGroup
genre: shibuya-kei
popularity: 7
followers: 478
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ad375af08f8eec0cf15d2d2ad4063e05c220261496ceb530dd48be3cf9a5039
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/719d7437-cd54-4fec-9b2d-4d60a1f60659.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/719d7437-cd54-4fec-9b2d-4d60a1f60659.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/719d7437-cd54-4fec-9b2d-4d60a1f60659
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad375af08f8eec0cf15d2d2ad4063e05c220261496ceb530dd48be3cf9a5039. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/719d7437-cd54-4fec-9b2d-4d60a1f60659.json and https://artists.proofprofile.net/proofs/artist/719d7437-cd54-4fec-9b2d-4d60a1f60659.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: Falling Down!!
  type: MusicAlbum
  date published: 2022-01-26
album: Falling Down!!
  type: MusicAlbum
  date published: 2022-01-26
album: 幸せのユクエ
  type: MusicAlbum
  date published: 2022-12-14
album: siawasenoyukue
  type: MusicAlbum
  date published: 2022-12-14
album: Mew!Mew! Symdrome!!
  type: MusicAlbum
  date published: 2023-05-31
album: Mew!Mew! Symdrome!!
  type: MusicAlbum
  date published: 2023-05-31
album: n.echo
  type: MusicAlbum
  date published: 2023-11-22
  track: うまれつき
    type: MusicRecording
    duration: PT4M8S
    duration ms: 248370
    explicit: false
    by artist: MEWCATUNE
    in album: n.echo
      type: MusicAlbum
      date published: 2023-11-22
    genre: shibuya-kei
    isrc code: TCJPY2317766
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T12:37:32+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8273f5fce2a4107780e22136bf7109ce781ef04ea57ca0be93bba2ecc7391bc5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958885
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958885
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2317766
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T15:40:11Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273f5fce2a4107780e22136bf7109ce781ef04ea57ca0be93bba2ecc7391bc5. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:11Z), 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/TCJPY2317766.
      date published: 2026-07-20T15:40:11Z
    audio: うまれつき
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.633
      additional property: Energy
        type: PropertyValue
        value: 0.733
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.374
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.082
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.63
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.445
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: n.echo
  type: MusicAlbum
  date published: 2023-11-22
album: santasan wo sogekisurusigoto
  type: MusicAlbum
  date published: 2023-12-15
album: 塗布塗布塗布塗布
  type: MusicAlbum
  date published: 2024-08-09
album: Tofutofutofu
  type: MusicAlbum
  date published: 2024-08-09
album: AOUYO-!
  type: MusicAlbum
  date published: 2024-10-23
album: 会おうよー！
  type: MusicAlbum
  date published: 2024-10-23
  track: 会おうよー！
    type: MusicRecording
    duration: PT4M0S
    duration ms: 240056
    explicit: false
    by artist: MEWCATUNE
    in album: 会おうよー！
      type: MusicAlbum
      date published: 2024-10-23
    genre: shibuya-kei
    isrc code: TCJPC2430207
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T18:12:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf3ee92b08beb418e28970254862e940e12652290398a4d1b5c48e2737c16edc5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958924
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958924
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2430207
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T21:07:34Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ee92b08beb418e28970254862e940e12652290398a4d1b5c48e2737c16edc5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:34Z), 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/TCJPC2430207.
      date published: 2026-07-20T21:07:34Z
    audio: 会おうよー！
album: MEWCATUNEも危険予知
album: MEWCATUNE Mo kikenyochi
album: sichirin soudaniigata ikou
album: 七輪 〜そうだ 新潟、行こう。〜

会おうよー！
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 156.03
additional property: Musical Key
  type: PropertyValue
  value: 6
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.596
additional property: Energy
  type: PropertyValue
  value: 0.921
additional property: Speechiness
  type: PropertyValue
  value: 0.042
additional property: Acousticness
  type: PropertyValue
  value: 0.079
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.367
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.962
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.603
additional property: Key Name
  type: PropertyValue
  value: F#
additional property: Mode Name
  type: PropertyValue
  value: Major

MEWCATUNEも危険予知
type: MusicAlbum
date published: 2025-07-30

MEWCATUNE Mo kikenyochi
type: MusicAlbum
date published: 2025-07-30

sichirin soudaniigata ikou
type: MusicAlbum
date published: 2025-10-24

七輪 〜そうだ 新潟、行こう。〜
type: MusicAlbum
date published: 2025-10-24