Marcelo Falcão
type: MusicGroup
description: Marcelo Falcão Custódio (born May 31, 1973, in Rio de Janeiro) is a Brazilian musician, the lead singer of the group O Rappa. Falcão was born and grew up in Engenho Novo, Rio de Janeiro. He sang wit
popularity: 5
followers: 70
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x52905c342826cc98eed533a6c1152fd59deb70963709bb635bae8d1af2b5bf98
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953922
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1bf6127e-678d-4910-98d1-35491dacab60.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/1bf6127e-678d-4910-98d1-35491dacab60.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1bf6127e-678d-4910-98d1-35491dacab60
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:36:34Z
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 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 0x52905c342826cc98eed533a6c1152fd59deb70963709bb635bae8d1af2b5bf98. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bf6127e-678d-4910-98d1-35491dacab60.json and https://artists.proofprofile.net/proofs/artist/1bf6127e-678d-4910-98d1-35491dacab60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T09:36:34Z
  text: {"copyright_id":"0x52905c342826cc98eed533a6c1152fd59deb70963709bb635bae8d1af2b5bf98","name":"Marcelo Falcão","registered_at":"2026-06-15T23:20:34Z","symbol":"NIM0863953","token_address":"0x1580c25009c81fc676bc3869ee70ef3d6b7dfaab","type":"artist","uuid":"1bf6127e-678d-4910-98d1-35491dacab60"}
album: Louco pra Voltar
  type: MusicAlbum
  date published: 2020-08-07
album: Sexta-Feira
  type: MusicAlbum
  date published: 2020-10-09
album: Céu Aberto
  type: MusicAlbum
  date published: 2021-03-20
track: Mangueira é mãe
  type: MusicRecording
  duration: PT3M15S
  duration ms: 195320
  explicit: false
  by artist: Alcione
  by artist: Marcelo Falcão
  in album: De tudo que eu gosto (Redux)
    type: MusicAlbum
    date published: 2007
  genre: mpb
  genre: pagode
  genre: samba
  isrc code: BRESM0700038
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRESM0700038
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef9700fa47f53d25c8bb4918cb2e76cc35206eaa4381e808c45f4b018ed99f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRESM0700038.
    date published: 2026-07-02T03:30:09Z
  audio: Mangueira é mãe
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
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      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.747
    additional property: Energy
      type: PropertyValue
      value: 0.902
    additional property: Speechiness
      type: PropertyValue
      value: 0.164
    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.074
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.92
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.648
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major