Paulo Freire
type: MusicGroup
description: Paulo Reglus Neves Freire (19 September 1921 – 2 May 1997) was a Brazilian educator and Marxist philosopher whose work revolutionized global thought on education. He is best known for Pedagogy of the
popularity: 10
followers: 2183
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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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  date published: 2026-06-21T10:35:31Z
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album: Brincadeira de Viola
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  date published: 2004
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      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
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      date published: 2026-07-05T22:14:35Z
    audio: Alecrim
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album: Rio Abaixo - Viola Brasileira
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  date published: 2004-01-29
album: Vai Ouvindo
  type: MusicAlbum
  date published: 2004-02-05
album: Redemoinho
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  date published: 2007-09-26
album: Nuá - Songs for the Traditional Brazilian Myths / Musicas para os Mitos Brasileiros
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  date published: 2009-08-31
album: São Gonçalo
  type: MusicAlbum
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album: Alto Grande
  type: MusicAlbum
  date published: 2013-09-10
album: Violinha Contadeira
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album: Pórva
  type: MusicAlbum
  date published: 2016-06-13
album: São Gonçalo
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  date published: 2018-11-09
album: Clarões na Madrugada (A Mula)
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  date published: 2024-05-01
album: Olavo (A Mula)
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  date published: 2024-05-08
album: Padre Armando e Zélia (A Mula)
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  date published: 2024-05-15
album: A Mula
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  date published: 2024-05-22
track: História de Pescador
track: Cantiga de Amigo
track: O Que É a Verdade?

História de Pescador
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by artist: Rita Rameh e Luiz Waack
by artist: Paulo Freire
by artist: Maurício Pereira
by artist: wandi doratioto
in album: Você Que Inventa
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  date published: 2018-04-06
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additional property: OTSVerifyInstructions
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  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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: História de Pescador
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Cantiga de Amigo
type: MusicRecording
duration: PT4M37S
duration ms: 277373
explicit: false
by artist: Ana Salvagni
by artist: Eduardo Lobo
by artist: Paulo Freire
in album: Canção do Amor Distante
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  date published: 2016-10-21
popularity: 2
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fd675692f7654729f40597f9b336c368ea103b11c3cc65930d46149b7d53a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BRA7S1600004.
  date published: 2026-07-31T05:48:30Z
audio: Cantiga de Amigo
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additional property: OTSTimestamp
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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

O Que É a Verdade?
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duration: PT5M3S
duration ms: 303594
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by artist: Leandro Rodrigues
by artist: Paulo Freire
in album: Louvor em Piano e Voz, Vol. IV
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd296d79b117301f5ccfd580e3f4702043e5adfb8d824405762f754c02d0633. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRLE01800088.
  date published: 2026-07-31T19:53:13Z
audio: O Que É a Verdade?
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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