泉水 いづみ
type: MusicGroup
popularity: 2
followers: 149
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb74b7a47f565502db803be3ba6f5590b72792f2a7005509b826ebfdcf254c093
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954134
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954134
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc2e87c-f9e2-490a-a836-54875af3c36f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc2e87c-f9e2-490a-a836-54875af3c36f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7dc2e87c-f9e2-490a-a836-54875af3c36f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:41:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb74b7a47f565502db803be3ba6f5590b72792f2a7005509b826ebfdcf254c093","name":"泉水 いづみ","registered_at":"2026-06-17T09:25:33Z","symbol":"NIM1351961","token_address":"0x8250bebc4cf3858a47c61247a16e0eae31e11743","type":"artist","uuid":"7dc2e87c-f9e2-490a-a836-54875af3c36f"}
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 0xb74b7a47f565502db803be3ba6f5590b72792f2a7005509b826ebfdcf254c093. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc2e87c-f9e2-490a-a836-54875af3c36f.json and https://artists.proofprofile.net/proofs/artist/7dc2e87c-f9e2-490a-a836-54875af3c36f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:41:05Z
  text: {"copyright_id":"0xb74b7a47f565502db803be3ba6f5590b72792f2a7005509b826ebfdcf254c093","name":"泉水 いづみ","registered_at":"2026-06-17T09:25:33Z","symbol":"NIM1351961","token_address":"0x8250bebc4cf3858a47c61247a16e0eae31e11743","type":"artist","uuid":"7dc2e87c-f9e2-490a-a836-54875af3c36f"}
album: まちかどのヒーロー やきいも！～Cool Version～
  type: MusicAlbum
  date published: 2017-09-20
  track: まちかどのヒーロー やきいも！～Cool Version～
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222549
    explicit: false
    by artist: 泉水 いづみ
    in album: まちかどのヒーロー やきいも！～Cool Version～
      type: MusicAlbum
      date published: 2017-09-20
    isrc code: JPC791700015
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T20:02:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x24d2d6b7ac86aa0190bc812615a1b37bf1ef568d9b7f33bee23edce9a8491298
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958776
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958776
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPC791700015
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T20:11:59Z
    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 0x24d2d6b7ac86aa0190bc812615a1b37bf1ef568d9b7f33bee23edce9a8491298. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/JPC791700015.
      date published: 2026-07-19T20:11:59Z
    audio: まちかどのヒーロー やきいも！～Cool Version～
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 118.021
      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: 0.902
      additional property: Energy
        type: PropertyValue
        value: 0.551
      additional property: Speechiness
        type: PropertyValue
        value: 0.042
      additional property: Acousticness
        type: PropertyValue
        value: 0.855
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.764
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.053
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major