DUCAT
type: MusicGroup
genre: city pop
genre: vaporwave
description: thumb|Austrian gold ducat depicting Kaiser Franz-Josef, The ducat ( ) coin was used as a trade coin in Europe from the later Middle Ages to the 19th century. Its most familiar version, the gold ducat
popularity: 18
followers: 2045
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a2c1fc771cb81c9e32869612937c07e65768dfb6b3db289bddd43508037d94. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d742155b-718c-4803-a2af-5f5d93ae9e82.json and https://artists.proofprofile.net/proofs/artist/d742155b-718c-4803-a2af-5f5d93ae9e82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T12:56:12Z
album: 「BACK IN THE DAZE」
  type: MusicAlbum
  date published: 2014-09-12
album: CYBER TRAPPIN'
  type: MusicAlbum
  date published: 2016-05-01
album: Cyber Trappin'
  type: MusicAlbum
  date published: 2018-05-11
album: Groovez
  type: MusicAlbum
  date published: 2018-10-12
album: Groovez
  type: MusicAlbum
  date published: 2018-10-12
album: Unlocked
  type: MusicAlbum
  date published: 2018-12-29
album: Project H2o
  type: MusicAlbum
  date published: 2019-01-16
album: Moonlight
  type: MusicAlbum
  date published: 2019-04-11
album: New Retro
  type: MusicAlbum
  date published: 2019-05-04
album: New Retro
  type: MusicAlbum
  date published: 2019-05-04
album: Summer Vibes Deluxe
  type: MusicAlbum
  date published: 2019-07-26
  track: Nautical Breeze
    type: MusicRecording
    duration: PT2M2S
    duration ms: 122908
    explicit: false
    by artist: DUCAT
    in album: Summer Vibes Deluxe
      type: MusicAlbum
      date published: 2019-07-26
    genre: city pop
    genre: vaporwave
    isrc code: QZFYZ1934637
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T12:44:42Z
    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 0xe668be49e06266df066112227eccd58af37c863f73f2565b9b87a68527432149. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:44:42Z), 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/QZFYZ1934637.
      date published: 2026-07-21T12:44:42Z
    audio: Nautical Breeze
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 171.838
      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
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      additional property: Energy
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.923
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
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album: Finesse
  type: MusicAlbum
  date published: 2019-11-15
album: Nu Diskette
  type: MusicAlbum
  date published: 2020-03-27
album: Sugar Rush
  type: MusicAlbum
  date published: 2021-04-08
album: Cyberphunk
  type: MusicAlbum
  date published: 2021-05-28
  track: Cyberphunk
    type: MusicRecording
    duration: PT3M23S
    duration ms: 203428
    explicit: false
    by artist: DUCAT
    in album: Cyberphunk
      type: MusicAlbum
      date published: 2021-05-28
    genre: city pop
    genre: vaporwave
    isrc code: QZHN42148241
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Cyberphunk
album: Daydream
album: Above The Clouds
album: ５０ ＴＨＯＵＳＡＮＤ ＹＥＮ （５万円）
album: Checkered Floor
album: Andromeda
album: Project Voyage
album: 50 THOUSAND YEN (5万円)
album: 永遠に再び (Forever Again)
album: Dial-Up (ダイヤルアップ)
album: Calypso
album: Found Funk Files

OTSTimestamp
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value: 2026-07-21T04:32:41Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5fcd9e1fa4134aa0a73bf9d853d03c2abb3a917395d10d734cbc72447e9f52. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:41Z), 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/QZHN42148241.
date published: 2026-07-21T04:32:41Z

Cyberphunk
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 124.042
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: 0.72
additional property: Energy
  type: PropertyValue
  value: 0.635
additional property: Speechiness
  type: PropertyValue
  value: 0.055
additional property: Acousticness
  type: PropertyValue
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additional property: Instrumentalness
  type: PropertyValue
  value: 0.007
additional property: Liveness
  type: PropertyValue
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additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.423
additional property: Loudness (dB)
  type: PropertyValue
  value: -12.02
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Major

Daydream
type: MusicAlbum
date published: 2021-07-16
track: Nu Diskette
  type: MusicRecording
  duration: PT3M20S
  duration ms: 200000
  explicit: false
  by artist: DUCAT
  in album: Daydream
    type: MusicAlbum
    date published: 2021-07-16
  genre: city pop
  genre: vaporwave
  isrc code: QZFZ72023120
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  additional property: CopyrightStatus
    type: PropertyValue
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    value: 958286
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    type: PropertyValue
    value: https://blockstream.info/api/block-height/958286
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72023120
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T12:43:37Z
  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 0x8a9a239824935aa8eeb1a94ba6b3c16af13d43a06a15f26497975a728d219005. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ72023120.
    date published: 2026-07-16T12:43:37Z
  audio: Nu Diskette
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 120.021
    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: 0.669
    additional property: Energy
      type: PropertyValue
      value: 0.552
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.852
    additional property: Liveness
      type: PropertyValue
      value: 0.031
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.767
    additional property: Loudness (dB)
      type: PropertyValue
      value: -12.114
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
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Above The Clouds
type: MusicAlbum
date published: 2021-09-08

５０ ＴＨＯＵＳＡＮＤ ＹＥＮ （５万円）
type: MusicAlbum
date published: 2021-09-18

Checkered Floor
type: MusicAlbum
date published: 2022-02-25

Andromeda
type: MusicAlbum
date published: 2022-04-08
track: Andromeda
  type: MusicRecording
  duration: PT3M25S
  duration ms: 205433
  explicit: false
  by artist: DUCAT
  in album: Andromeda
    type: MusicAlbum
    date published: 2022-04-08
  genre: city pop
  genre: vaporwave
  isrc code: QZES72286146
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  additional property: CopyrightStatus
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    type: PropertyValue
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72286146
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T23:08:43Z
  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 0x273bd03ec04bbf53d8bd4e2f7cb3139790ebe63239a792062f78002915bb0f15. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:08:43Z), 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/QZES72286146.
    date published: 2026-07-21T23:08:43Z
  audio: Andromeda
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.029
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.688
    additional property: Energy
      type: PropertyValue
      value: 0.342
    additional property: Speechiness
      type: PropertyValue
      value: 0.044
    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
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    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
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    additional property: Key Name
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    additional property: Mode Name
      type: PropertyValue
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Project Voyage
type: MusicAlbum
date published: 2022-04-22

50 THOUSAND YEN (5万円)
type: MusicAlbum
date published: 2022-11-17

永遠に再び (Forever Again)
type: MusicAlbum
date published: 2023-02-16

Dial-Up (ダイヤルアップ)
type: MusicAlbum
date published: 2025-02-21

Calypso
type: MusicAlbum
date published: 2025-05-23

Found Funk Files
type: MusicAlbum
date published: 2025-07-25