あっとくん
type: MusicGroup
genre: vocaloid
popularity: 13
followers: 17521
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xebf77961f90fd645fc2b16923d83b58be8f674ce4937db5b73b982ac89416417
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953638
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953638
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/399c2904-bde1-4de4-b4b4-42520bad250a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/399c2904-bde1-4de4-b4b4-42520bad250a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/399c2904-bde1-4de4-b4b4-42520bad250a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T13:10:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xebf77961f90fd645fc2b16923d83b58be8f674ce4937db5b73b982ac89416417","name":"あっとくん","registered_at":"2026-06-14T10:29:21Z","symbol":"NIM0424606","token_address":"0x3549c1bbd817b984eb27dcb39fb9e1ae1e4119ba","type":"artist","uuid":"399c2904-bde1-4de4-b4b4-42520bad250a"}
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 0xebf77961f90fd645fc2b16923d83b58be8f674ce4937db5b73b982ac89416417. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/399c2904-bde1-4de4-b4b4-42520bad250a.json and https://artists.proofprofile.net/proofs/artist/399c2904-bde1-4de4-b4b4-42520bad250a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0xebf77961f90fd645fc2b16923d83b58be8f674ce4937db5b73b982ac89416417","name":"あっとくん","registered_at":"2026-06-14T10:29:21Z","symbol":"NIM0424606","token_address":"0x3549c1bbd817b984eb27dcb39fb9e1ae1e4119ba","type":"artist","uuid":"399c2904-bde1-4de4-b4b4-42520bad250a"}
album: CrazyCrash
  type: MusicAlbum
  date published: 2019-08-02
album: マッドディペンデンス
  type: MusicAlbum
  date published: 2019-12-25
album: ブラッディーメアリー
  type: MusicAlbum
  date published: 2020-08-19
album: 瞬間パラドクス
  type: MusicAlbum
  date published: 2020-12-26
album: Aces (type A, Digital Edition)
  type: MusicAlbum
  date published: 2021-02-17
  track: 瞬間パラドクス
    type: MusicRecording
    duration: PT4M20S
    duration ms: 260066
    explicit: false
    by artist: あっとくん
    in album: Aces (type A, Digital Edition)
      type: MusicAlbum
      date published: 2021-02-17
    genre: vocaloid
    isrc code: JPFL02000430
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T11:00:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4f7d1e703eb2ee65d320df8c6dbec5086ae21a7452afef99f77284562058d0fa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958286
    additional property: OTSBitcoinBlockVerifyURL
      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/JPFL02000430
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T14:10:44Z
    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 0x4f7d1e703eb2ee65d320df8c6dbec5086ae21a7452afef99f77284562058d0fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:44Z), 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/JPFL02000430.
      date published: 2026-07-16T14:10:44Z
    audio: 瞬間パラドクス
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 139.998
      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: 0.71
      additional property: Energy
        type: PropertyValue
        value: 0.882
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.22
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.203
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.829
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.347
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: マッドディペンデンス
    type: MusicRecording
    duration: PT3M22S
    duration ms: 202164
    explicit: false
    by artist: あっとくん
    in album: Aces (type A, Digital Edition)
      type: MusicAlbum
      date published: 2021-02-17
    genre: vocaloid
    isrc code: JPFL01900440
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T20:41:47+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x317b1ccbf792cd83de79388d98db12684b93f91a1853e119df5715363eb39c68
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958779
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958779
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPFL01900440
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T23:43:19Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317b1ccbf792cd83de79388d98db12684b93f91a1853e119df5715363eb39c68. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:19Z), 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/JPFL01900440.
      date published: 2026-07-19T23:43:19Z
    audio: マッドディペンデンス
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126
      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: 0.746
      additional property: Energy
        type: PropertyValue
        value: 0.864
      additional property: Speechiness
        type: PropertyValue
        value: 0.154
      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: Aces (type B, Digital Edition)
album: 寂寞
album: ドープ

Acousticness
type: PropertyValue
value: 0.066

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.121

Valence (Positivity)
type: PropertyValue
value: 0.795

Loudness (dB)
type: PropertyValue
value: -4.359

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Aces (type B, Digital Edition)
type: MusicAlbum
date published: 2021-02-17
track: 東京深夜シンドローム
  type: MusicRecording
  duration: PT5M0S
  duration ms: 300466
  explicit: false
  by artist: あっとくん
  in album: Aces (type B, Digital Edition)
    type: MusicAlbum
    date published: 2021-02-17
  genre: vocaloid
  isrc code: JPFL02000510
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T00:29:55+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe67c80612be2cb53acdebb5e54a4ce54e9cac2aacc345a48cbc52ec8136af8bc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958802
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958802
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPFL02000510
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T01:04:02Z
  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 0xe67c80612be2cb53acdebb5e54a4ce54e9cac2aacc345a48cbc52ec8136af8bc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPFL02000510.
    date published: 2026-07-20T01:04:02Z
  audio: 東京深夜シンドローム
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.012
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.653
    additional property: Energy
      type: PropertyValue
      value: 0.851
    additional property: Speechiness
      type: PropertyValue
      value: 0.042
    additional property: Acousticness
      type: PropertyValue
      value: 0.067
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.124
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.76
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.849
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Minor

寂寞
type: MusicAlbum
date published: 2021-08-18

ドープ
type: MusicAlbum
date published: 2022-01-19