Mauricio Oliveira
type: MusicGroup
genre: brazilian jazz
description: Mauricio Santa Cruz Oliveira (born 17 October 1974 in Rio de Janeiro) is a Brazilian sailor who competed in the Summer Olympic Games, the Pan American Games, the Snipe World Championships and the J/24
popularity: 9
followers: 109
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65527d870eb0f12a6940c1f56bdb253cf2dbbc52cad498ed77b0ee2262bc6e9. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18afc120-68e2-4091-a944-85e44ec61c48.json and https://artists.proofprofile.net/proofs/artist/18afc120-68e2-4091-a944-85e44ec61c48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
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album: Um Violão... E Novas Emoções
  type: MusicAlbum
  date published: 1963-01-01
  track: Canção da Paz
    type: MusicRecording
    duration: PT4M0S
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    explicit: false
    by artist: Mauricio Oliveira
    in album: Um Violão... E Novas Emoções
      type: MusicAlbum
      date published: 1963-01-01
    genre: brazilian jazz
    isrc code: QM4TW1558799
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T04:34:46Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa926e3aaa5e9059e3b0727fb2d306d9dbe96a5fc65cde14ad448344fee6bf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM4TW1558799.
      date published: 2026-07-17T04:34:46Z
    audio: Canção da Paz
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.236
      additional property: Musical Key
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      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
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      additional property: Acousticness
        type: PropertyValue
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      additional property: Instrumentalness
        type: PropertyValue
        value: 0.934
      additional property: Liveness
        type: PropertyValue
        value: 0.159
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.568
      additional property: Loudness (dB)
        type: PropertyValue
        value: -23.437
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Mauricio Oliveira e Seu Violão
  type: MusicAlbum
  date published: 1966-01-01
  track: Berimbau
    type: MusicRecording
    duration: PT4M54S
    duration ms: 294813
    explicit: false
    by artist: Mauricio Oliveira
    in album: Mauricio Oliveira e Seu Violão
      type: MusicAlbum
      date published: 1966-01-01
    genre: brazilian jazz
    isrc code: QM4TW1558812
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    additional property: OTSTimestamp
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      value: 2026-07-06T01:25:57Z
    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 0xa0529e0b8403b84727df47f0a578aed63a2064928460f04bb943e13a43efa06f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW1558812.
      date published: 2026-07-06T01:25:57Z
    audio: Berimbau
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.993
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
        value: 0.049
      additional property: Acousticness
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        value: 0.987
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.953
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.106

Valence (Positivity)
type: PropertyValue
value: 0.142

Loudness (dB)
type: PropertyValue
value: -17.804

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Minor