Helo Sakawa
type: MusicGroup
popularity: 8
followers: 1065
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x35bcf8192e27cd4aac3889568375f8f85ef27eeb732c4fdd6b2b2fbd9d72521d
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/e7bc00bf-4ef1-4163-b664-dc3d4b6020fd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7bc00bf-4ef1-4163-b664-dc3d4b6020fd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7bc00bf-4ef1-4163-b664-dc3d4b6020fd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x35bcf8192e27cd4aac3889568375f8f85ef27eeb732c4fdd6b2b2fbd9d72521d","name":"Helo Sakawa","registered_at":"2026-06-21T09:19:11Z","symbol":"NIM1886568","token_address":"0x3a4f51c83df6a552a41cbc99afc41204807f47ae","type":"artist","uuid":"e7bc00bf-4ef1-4163-b664-dc3d4b6020fd"}
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 0x35bcf8192e27cd4aac3889568375f8f85ef27eeb732c4fdd6b2b2fbd9d72521d. 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/e7bc00bf-4ef1-4163-b664-dc3d4b6020fd.json and https://artists.proofprofile.net/proofs/artist/e7bc00bf-4ef1-4163-b664-dc3d4b6020fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x35bcf8192e27cd4aac3889568375f8f85ef27eeb732c4fdd6b2b2fbd9d72521d","name":"Helo Sakawa","registered_at":"2026-06-21T09:19:11Z","symbol":"NIM1886568","token_address":"0x3a4f51c83df6a552a41cbc99afc41204807f47ae","type":"artist","uuid":"e7bc00bf-4ef1-4163-b664-dc3d4b6020fd"}
album: DDD DIFERENTE
  type: MusicAlbum
  date published: 2024-10-10
album: LEMBRANÇAS
  type: MusicAlbum
  date published: 2025-05-05
  track: LEMBRANÇAS
    type: MusicRecording
    duration: PT2M57S
    duration ms: 177215
    explicit: false
    by artist: Helo Sakawa
    in album: LEMBRANÇAS
      type: MusicAlbum
      date published: 2025-05-05
    isrc code: USHM22502726
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T21:55:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd963583f7c2104bcdc71d1fa1d62289105c6e4810f77f016cb0e9cc1ee2b10f4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22502726
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0xd963583f7c2104bcdc71d1fa1d62289105c6e4810f77f016cb0e9cc1ee2b10f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM22502726.
      date published: 2026-07-04T11:19:20Z
    audio: LEMBRANÇAS
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.016
      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: 0.594
      additional property: Energy
        type: PropertyValue
        value: 0.634
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0.393
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.358
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.327
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.633
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major