Helmo de Freitas - o Carijó
type: MusicGroup
genre: chamamé
popularity: 6
followers: 283
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcbe7c2413a950eab0d2a7300091737bd780413aa56fff1a7b91cc413e01c89ce
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953843
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953843
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:27:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcbe7c2413a950eab0d2a7300091737bd780413aa56fff1a7b91cc413e01c89ce","name":"Helmo de Freitas - o Carijó","registered_at":"2026-06-15T13:47:44Z","symbol":"NIM0727269","token_address":"0xf3a3c073ae815498db1816d7d0346f5cede99d41","type":"artist","uuid":"00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d"}
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 0xcbe7c2413a950eab0d2a7300091737bd780413aa56fff1a7b91cc413e01c89ce. Chain 2 (Bitcoin): anchored in block 953843 (2026-06-15T22:27:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d.json and https://artists.proofprofile.net/proofs/artist/00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:27:31Z
  text: {"copyright_id":"0xcbe7c2413a950eab0d2a7300091737bd780413aa56fff1a7b91cc413e01c89ce","name":"Helmo de Freitas - o Carijó","registered_at":"2026-06-15T13:47:44Z","symbol":"NIM0727269","token_address":"0xf3a3c073ae815498db1816d7d0346f5cede99d41","type":"artist","uuid":"00d7b7cd-cd3d-4eaa-8922-b7a85a9c800d"}
album: Lago Verde Azul
  type: MusicAlbum
  date published: 1997-11-01
  track: Lago Verde Azul
    type: MusicRecording
    duration: PT4M35S
    duration ms: 275160
    explicit: false
    by artist: Helmo de Freitas - o Carijó
    in album: Lago Verde Azul
      type: MusicAlbum
      date published: 1997-11-01
    genre: chamamé
    isrc code: BRAPI0602247
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T18:42:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9bf3a740bce11a791b0d045cc9cfab0f72f12cc6b12fa048f6b8936effe21fc0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958194
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958194
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAPI0602247
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T20:32:27Z
    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 0x9bf3a740bce11a791b0d045cc9cfab0f72f12cc6b12fa048f6b8936effe21fc0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRAPI0602247.
      date published: 2026-07-15T20:32:27Z
    audio: Lago Verde Azul
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.008
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.486
      additional property: Energy
        type: PropertyValue
        value: 0.374
      additional property: Speechiness
        type: PropertyValue
        value: 0.054
      additional property: Acousticness
        type: PropertyValue
        value: 0.676
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.39
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.588
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.219
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major