Leandro Cardoso
type: MusicGroup
genre: brazilian evangelical music
description: Leandro Fernandes Cardoso (born 11 May 1999) is a Portuguese professional footballer who plays for Marítimo B as a forward. Club career Born in Figueira da Foz, Cardoso began playing at hometown club
popularity: 3
followers: 165
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/954549
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  value: https://artists.proofprofile.net/proofs/artist/a81c374d-56ab-4b98-bb1a-cbe80f61d203.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2906860ff8d3ff22a483281dcc079d31b6e8ed02f445558829fc04b9e17d5f. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a81c374d-56ab-4b98-bb1a-cbe80f61d203.json and https://artists.proofprofile.net/proofs/artist/a81c374d-56ab-4b98-bb1a-cbe80f61d203.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0xae2906860ff8d3ff22a483281dcc079d31b6e8ed02f445558829fc04b9e17d5f","name":"Leandro Cardoso","registered_at":"2026-06-20T08:27:55Z","symbol":"NIM1566341","token_address":"0x85aa832feb5edb7567c539f513400282f5171dfe","type":"artist","uuid":"a81c374d-56ab-4b98-bb1a-cbe80f61d203"}
album: Além do Tempo
  type: MusicAlbum
  date published: 2015-11-30
  track: Ao Findar o Labor Desta Vida
    type: MusicRecording
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    duration ms: 212690
    explicit: false
    by artist: Leandro Cardoso
    in album: Além do Tempo
      type: MusicAlbum
      date published: 2015-11-30
    genre: brazilian evangelical music
    isrc code: USHM91622939
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T03:24:09Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063a2cd552abdf7006350fb9caaad6bc2b14941510a2edb44fb0d310b5db750. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM91622939.
      date published: 2026-07-20T03:24:09Z
    audio: Ao Findar o Labor Desta Vida
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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        value: 0.317
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.635
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Te Restaurarei Brasil
  type: MusicAlbum
  date published: 2022-11-22
album: Tempo de Cura
  type: MusicAlbum
  date published: 2022-12-14
album: Meu Amigo
  type: MusicAlbum
  date published: 2024-06-25