足首
type: MusicGroup
genre: vocaloid
popularity: 5
followers: 1531
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcf7a9bcaa450c789d23e1ff470dbd825c150a9dfacedfd2317ea243212754962
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954553
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954553
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/adae8f6f-5189-409c-b45a-a784a617f145.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/adae8f6f-5189-409c-b45a-a784a617f145.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/adae8f6f-5189-409c-b45a-a784a617f145
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T11:51:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcf7a9bcaa450c789d23e1ff470dbd825c150a9dfacedfd2317ea243212754962","name":"足首","registered_at":"2026-06-20T10:13:02Z","symbol":"NIM1592533","token_address":"0xab5967b3ab925b654940d6cfe8fcc0bdc1782a43","type":"artist","uuid":"adae8f6f-5189-409c-b45a-a784a617f145"}
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 0xcf7a9bcaa450c789d23e1ff470dbd825c150a9dfacedfd2317ea243212754962. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adae8f6f-5189-409c-b45a-a784a617f145.json and https://artists.proofprofile.net/proofs/artist/adae8f6f-5189-409c-b45a-a784a617f145.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T11:51:30Z
  text: {"copyright_id":"0xcf7a9bcaa450c789d23e1ff470dbd825c150a9dfacedfd2317ea243212754962","name":"足首","registered_at":"2026-06-20T10:13:02Z","symbol":"NIM1592533","token_address":"0xab5967b3ab925b654940d6cfe8fcc0bdc1782a43","type":"artist","uuid":"adae8f6f-5189-409c-b45a-a784a617f145"}
album: Trope
  type: MusicAlbum
  date published: 2016-10-19
  track: 疑心暗鬼
    type: MusicRecording
    duration: PT2M52S
    duration ms: 172306
    explicit: false
    by artist: 足首
    in album: Trope
      type: MusicAlbum
      date published: 2016-10-19
    genre: vocaloid
    isrc code: JPC231600559
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T01:25:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x21a7bed92b301fe4148e12626432e5a74006a5f77e155703bb6542bf0261ad8b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958480
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958480
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPC231600559
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T02:58:58Z
    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 0x21a7bed92b301fe4148e12626432e5a74006a5f77e155703bb6542bf0261ad8b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPC231600559.
      date published: 2026-07-18T02:58:58Z
    audio: 疑心暗鬼
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.922
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.697
      additional property: Energy
        type: PropertyValue
        value: 0.806
      additional property: Speechiness
        type: PropertyValue
        value: 0.176
      additional property: Acousticness
        type: PropertyValue
        value: 0.011
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.101
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.899
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.453
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: 頓珍漢の宴
    type: MusicRecording
    duration: PT3M52S
    duration ms: 232626
    explicit: false
    by artist: 足首
    in album: Trope
      type: MusicAlbum
      date published: 2016-10-19
    genre: vocaloid
    isrc code: JPC231600560
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T04:21:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9875810da04fbb546dfd0d0c3d5245c40fe9f475724356c091f7f48603292315
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956891
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956891
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPC231600560
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T07:16:32Z
    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 0x9875810da04fbb546dfd0d0c3d5245c40fe9f475724356c091f7f48603292315. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPC231600560.
      date published: 2026-07-06T07:16:32Z
    audio: 頓珍漢の宴
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 145.048
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.6
      additional property: Energy
        type: PropertyValue
        value: 0.888
      additional property: Speechiness
        type: PropertyValue
        value: 0.289
      additional property: Acousticness
        type: PropertyValue
        value: 0.003
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.241
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.729
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Loudness (dB)
type: PropertyValue
value: -5.481

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Minor