Hajimu Takeda
type: MusicGroup
popularity: 6
followers: 59
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc66138b6031f27582aad0ac7aa8ba0d63c4241ba2a67750ad45fb94338ec49d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e88235f3-28fa-46f6-b444-19477cc90781.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e88235f3-28fa-46f6-b444-19477cc90781.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e88235f3-28fa-46f6-b444-19477cc90781
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdc66138b6031f27582aad0ac7aa8ba0d63c4241ba2a67750ad45fb94338ec49d","name":"Hajimu Takeda","registered_at":"2026-06-21T09:18:55Z","symbol":"NIM1886284","token_address":"0xc5e200b86df0cbe53b7785b5e1c30cef74dd2669","type":"artist","uuid":"e88235f3-28fa-46f6-b444-19477cc90781"}
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 0xdc66138b6031f27582aad0ac7aa8ba0d63c4241ba2a67750ad45fb94338ec49d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e88235f3-28fa-46f6-b444-19477cc90781.json and https://artists.proofprofile.net/proofs/artist/e88235f3-28fa-46f6-b444-19477cc90781.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0xdc66138b6031f27582aad0ac7aa8ba0d63c4241ba2a67750ad45fb94338ec49d","name":"Hajimu Takeda","registered_at":"2026-06-21T09:18:55Z","symbol":"NIM1886284","token_address":"0xc5e200b86df0cbe53b7785b5e1c30cef74dd2669","type":"artist","uuid":"e88235f3-28fa-46f6-b444-19477cc90781"}
album: タニタ食堂(R)のおんがく～おうちごはん
  type: MusicAlbum
  date published: 2012-01-20
album: ゆっくり走って、健康になる！スロージョギング(R)
  type: MusicAlbum
  date published: 2013-01-23
album: スポーツドクターがすすめる 爽快ウォーキング
  type: MusicAlbum
  date published: 2013-01-23
album: 楽やせダイエット・メソッド スロージョギング(R)＆ダイエット
  type: MusicAlbum
  date published: 2013-06-28
album: mono
  type: MusicAlbum
  date published: 2016-10-27
album: mono
  type: MusicAlbum
  date published: 2016-10-27
album: Moriuta ~ 守唄
  type: MusicAlbum
  date published: 2018-02-20
album: Moriuta
  type: MusicAlbum
  date published: 2018-02-20
album: 守唄 II
  type: MusicAlbum
  date published: 2019-07-25
  track: モーツァルトの子守唄
    type: MusicRecording
    duration: PT4M25S
    duration ms: 265213
    explicit: false
    by artist: Hajimu Takeda
    in album: 守唄 II
      type: MusicAlbum
      date published: 2019-07-25
    isrc code: JPV391650077
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T03:07:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8bc7c8ab3eb136e4ebbde223be34e95897e8035372313dcd70e8db52ef101c5c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958812
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958812
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPV391650077
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T03:24:09Z
    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 0x8bc7c8ab3eb136e4ebbde223be34e95897e8035372313dcd70e8db52ef101c5c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPV391650077.
      date published: 2026-07-20T03:24:09Z
    audio: モーツァルトの子守唄
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 100.69
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.428
      additional property: Energy
        type: PropertyValue
        value: 0.019
      additional property: Speechiness
        type: PropertyValue
        value: 0.06
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.943
      additional property: Liveness
        type: PropertyValue
        value: 0.072
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.251
      additional property: Loudness (dB)
        type: PropertyValue
        value: -26.098
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Moriuta II
  type: MusicAlbum
  date published: 2019-07-25