たけとんぼ
type: MusicGroup
genre: japanese indie
popularity: 3
followers: 1304
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x43ac404adf1a411463eedd68cd2d88b8ffc3bc3796b88569ccc240cc518f921d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953996
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953996
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/310c8827-41d2-4333-b1aa-21ab2cd56a8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/310c8827-41d2-4333-b1aa-21ab2cd56a8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/310c8827-41d2-4333-b1aa-21ab2cd56a8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:04:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x43ac404adf1a411463eedd68cd2d88b8ffc3bc3796b88569ccc240cc518f921d","name":"たけとんぼ","registered_at":"2026-06-16T06:40:14Z","symbol":"NIM0968968","token_address":"0x800043cb7fd241afe6bad77694679ccd9de8d3c5","type":"artist","uuid":"310c8827-41d2-4333-b1aa-21ab2cd56a8b"}
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 0x43ac404adf1a411463eedd68cd2d88b8ffc3bc3796b88569ccc240cc518f921d. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/310c8827-41d2-4333-b1aa-21ab2cd56a8b.json and https://artists.proofprofile.net/proofs/artist/310c8827-41d2-4333-b1aa-21ab2cd56a8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:04:35Z
  text: {"copyright_id":"0x43ac404adf1a411463eedd68cd2d88b8ffc3bc3796b88569ccc240cc518f921d","name":"たけとんぼ","registered_at":"2026-06-16T06:40:14Z","symbol":"NIM0968968","token_address":"0x800043cb7fd241afe6bad77694679ccd9de8d3c5","type":"artist","uuid":"310c8827-41d2-4333-b1aa-21ab2cd56a8b"}
album: 丘をこえて
  type: MusicAlbum
  date published: 2018-11-16
album: 春はまだか／旅の前
  type: MusicAlbum
  date published: 2021-03-26
album: ラララ／便り
  type: MusicAlbum
  date published: 2021-04-05
  track: ラララ
    type: MusicRecording
    duration: PT5M16S
    duration ms: 316485
    explicit: false
    by artist: たけとんぼ
    in album: ラララ／便り
      type: MusicAlbum
      date published: 2021-04-05
    genre: japanese indie
    isrc code: TCJPN2020367
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T18:48:41+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x271acf9a4d7486a371036c003f55f6b1128bf926acd9c0544916d2cf84ec4885
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958600
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958600
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPN2020367
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T19:24:05Z
    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 0x271acf9a4d7486a371036c003f55f6b1128bf926acd9c0544916d2cf84ec4885. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPN2020367.
      date published: 2026-07-18T19:24:05Z
    audio: ラララ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.952
      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: 0.671
      additional property: Energy
        type: PropertyValue
        value: 0.72
      additional property: Speechiness
        type: PropertyValue
        value: 0.025
      additional property: Acousticness
        type: PropertyValue
        value: 0.365
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.048
      additional property: Liveness
        type: PropertyValue
        value: 0.204
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.833
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.434
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 夏のコントラスト
  type: MusicAlbum
  date published: 2021-09-02
album: たけとんぼ
  type: MusicAlbum
  date published: 2022-07-27
album: 夜のむこうまで
  type: MusicAlbum
  date published: 2023-02-15