Humberto Teixeira
type: MusicGroup
description: Humberto Cavalcanti de Albuquerque Teixeira (5 January 1915 – 3 October 1979) was a Brazilian lawyer, politician, musician, and composer, mostly known for his partnership with musician Luiz Gonzaga. T
popularity: 7
followers: 360
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x9a9de28d864f6290bed1facc87541195ecc2ea166d20251bdb7d008506faad6b
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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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: 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 0x9a9de28d864f6290bed1facc87541195ecc2ea166d20251bdb7d008506faad6b. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/029f6979-7ee6-43dd-9b1e-73845639c72e.json and https://artists.proofprofile.net/proofs/artist/029f6979-7ee6-43dd-9b1e-73845639c72e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x9a9de28d864f6290bed1facc87541195ecc2ea166d20251bdb7d008506faad6b","name":"Humberto Teixeira","registered_at":"2026-06-15T14:33:38Z","symbol":"NIM0738228","token_address":"0xd20e457ff7c530e88503b547c86ee99d9859f37f","type":"artist","uuid":"029f6979-7ee6-43dd-9b1e-73845639c72e"}
album: Baião de Dois
  type: MusicAlbum
  date published: 2021-03-22
album: Assum Preto
  type: MusicAlbum
  date published: 2022-02-22
track: Kalu - Ao Vivo
  type: MusicRecording
  duration: PT2M42S
  duration ms: 162200
  explicit: false
  by artist: Humberto Teixeira
  by artist: Caetano Veloso
  in album: Caetano Veloso - Totalmente Demais
    type: MusicAlbum
    date published: 1986-01-01
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRMCA8600128
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T13:32:09Z
  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 0x32b767b09b274ecf787e3895de654ab57c4ecdec76abeb6ac4427b48b360d609. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRMCA8600128.
    date published: 2026-06-13T13:32:09Z
  audio: Kalu - Ao Vivo
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
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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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    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.646
    additional property: Key Name
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      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major