Maurinho do Acordeon
type: MusicGroup
genre: forró
popularity: 5
followers: 103
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e05a9c64ccc67bd5197656c5731188b40492dadea8e739a614592e03fab0c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88db0fef-819c-46fc-afac-c049d14844fd.json and https://artists.proofprofile.net/proofs/artist/88db0fef-819c-46fc-afac-c049d14844fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x799e05a9c64ccc67bd5197656c5731188b40492dadea8e739a614592e03fab0c","name":"Maurinho do Acordeon","registered_at":"2026-06-17T13:27:19Z","symbol":"NIM1409539","token_address":"0x7cb87c7db69e67d17dd6c59b69debf1e27f179ce","type":"artist","uuid":"88db0fef-819c-46fc-afac-c049d14844fd"}
album: Maurinho do Acordeon
  type: MusicAlbum
  date published: 2021-05-04
  track: Cheiro da Casca da Madeira
    type: MusicRecording
    duration: PT3M59S
    duration ms: 239426
    explicit: false
    by artist: Maurinho do Acordeon
    in album: Maurinho do Acordeon
      type: MusicAlbum
      date published: 2021-05-04
    genre: forró
    isrc code: QZHZ42117379
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      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:22:18Z
    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 0xfaa4cf3cef3e9813e8fbce80eb8703eea6ded5f5a497a23728ab07677ceb92f5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHZ42117379.
      date published: 2026-07-16T07:22:18Z
    audio: Cheiro da Casca da Madeira
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.505
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.83
      additional property: Energy
        type: PropertyValue
        value: 0.975
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.606
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.081
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.89
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.245
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Promocional de São João
  type: MusicAlbum
  date published: 2023-03-30
album: Maurinho do Acordeon no Bé Bé Bé do Bode
  type: MusicAlbum
  date published: 2024-05-13