Osvaldo Lacerda
type: MusicGroup
genre: choral
description: Osvaldo Costa de Lacerda (March 23, 1927 – July 18, 2011) was a Brazilian composer and professor of music. Lacerda is known for a Brazilian nationalist musical style that combines elements of Brazilia
popularity: 3
followers: 574
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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 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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  date published: 2026-06-20T08:57:02Z
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album: Romaria: Choral Music from Brazil
  type: MusicAlbum
  date published: 2015-05-04
  track: Jubiabá
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    by artist: Choir of Gonville & Caius College, Cambridge
    by artist: Imogen Sebba
    by artist: Geoffrey Webber
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      type: MusicAlbum
      date published: 2015-05-04
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
    audio: Jubiabá
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album: Fantasia sul America
  type: MusicAlbum
  date published: 1992
album: Marcas d'Água: Música Brasileira para Clarineta e Piano
  type: MusicAlbum
  date published: 2005-06-01
  track: Sonata para Clarineta e Piano: III. Rondó Allegro Grazioso
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      type: MusicAlbum
      date published: 2005-06-01
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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 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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      date published: 2026-07-08T03:20:19Z
    audio: Sonata para Clarineta e Piano: III. Rondó Allegro Grazioso
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      additional property: Tempo (BPM)
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album: Paulicéia - Obras para trompete solo
album: The Classical Brazilian Guitar
album: Cantos de Saudade
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 3
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 6
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 5
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 4
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 2
album: Obra Integral para Piano de Osvaldo Lacerda, Vol. 1
album: Saudade - Chormusik aus Brasilien
album: Osvaldo Lacerda - Música de Câmara
album: Fuga Saudosa
album: Suite Coral N°6
album: Boi Tungão
album: Integrais
album: Paisagem Brasileira - Flute and Piano Music from Brazil
album: The Brazilian Classical Song
album: Musica de América del Sur
album: 20th Century Music for Solo Flute
album: Série Música Brasileira 1
album: Chorinho
album: O Brasileiro de Sempre
album: Fronteras Latinas, Choros, Tangos y Valsas
album: Nacionalistas
album: Música, Doce Música (Recital)
album: Concert d'aujourd hui
album: Percussion Solos and Percussion in Chamber Music
album: XX Century Music for Solo Clarinet
album: Canções Brasileiras
album: Série Música Brasileira 2
album: Brazilian Music for Oboe and Piano
album: Brasil Piano
album: Brazilian Music for Viola and Piano
album: Epigrams
album: Musique classique Brésilienne
album: O Cravo Brasileiro
album: Série Música Brasileira 3
album: Prosas
album: Brazilian Trombone

Acousticness
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value: 0.993

Instrumentalness
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Liveness
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value: 0.173

Valence (Positivity)
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Loudness (dB)
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value: -21.746

Key Name
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Mode Name
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value: Minor

Paulicéia - Obras para trompete solo
type: MusicAlbum
date published: 2005

The Classical Brazilian Guitar
type: MusicAlbum
date published: 1971-02-12
track: Requebra Morena
  type: MusicRecording
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  by artist: Isaías Sávio
  by artist: Maria Livia Sao Marcos
  in album: The Classical Brazilian Guitar
    type: MusicAlbum
    date published: 1971-02-12
  popularity: 2
  isrc code: QM4TW2097341
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  additional property: OTSVerificationAPI
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T06:58:00Z
  audio: Requebra Morena
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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track: Nesta Rua
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  by artist: Isaías Sávio
  by artist: Maria Livia Sao Marcos
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    date published: 1971-02-12
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T20:22:46Z
  audio: Nesta Rua
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Cantos de Saudade
type: MusicAlbum
date published: 2022-11-27

Obra Integral para Piano de Osvaldo Lacerda, Vol. 3
type: MusicAlbum
date published: 2017-11-20

Obra Integral para Piano de Osvaldo Lacerda, Vol. 6
type: MusicAlbum
date published: 2017-09-28

Obra Integral para Piano de Osvaldo Lacerda, Vol. 5
type: MusicAlbum
date published: 2017-09-27

Obra Integral para Piano de Osvaldo Lacerda, Vol. 4
type: MusicAlbum
date published: 2017-09-25

Obra Integral para Piano de Osvaldo Lacerda, Vol. 2
type: MusicAlbum
date published: 2017-09-18

Obra Integral para Piano de Osvaldo Lacerda, Vol. 1
type: MusicAlbum
date published: 2017-09-18

Saudade - Chormusik aus Brasilien
type: MusicAlbum
date published: 2011-10-24
track: Missa Diligite: Kyrie
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  by artist: Apollini et Musis
  by artist: Pia Bohnert
  by artist: Elke Engel
  by artist: Soongoo Lee
  by artist: Thomas Neubauer
  by artist: Vinzenz Weissenburger
  by artist: Jörg Strodthoff
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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 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 0xc98f04fd67b7ecd1181735264001a8512a4b8d661110b54483afce75741ec8a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN421105001.
    date published: 2026-07-08T03:20:19Z
  audio: Missa Diligite: Kyrie
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      value: 0.867
    additional property: Liveness
      type: PropertyValue
      value: 0.102
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.033
    additional property: Loudness (dB)
      type: PropertyValue
      value: -25.318
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Missa Diligite: Gloria
  type: MusicRecording
  duration: PT3M47S
  duration ms: 227000
  explicit: false
  by artist: Camargo Guarnieri
  by artist: Apollini et Musis
  by artist: Pia Bohnert
  by artist: Elke Engel
  by artist: Soongoo Lee
  by artist: Thomas Neubauer
  by artist: Vinzenz Weissenburger
  by artist: Jörg Strodthoff
  in album: Saudade - Chormusik aus Brasilien
    type: MusicAlbum
    date published: 2011-10-24
  isrc code: DEN421105002
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T07:37:09+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xeee89e4340ed4ec0509fb81933da22603cec9f2744e31af0aea89f3c33ad0f0c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960368
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960368
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN421105002
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T08:26:41Z
  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 0xeee89e4340ed4ec0509fb81933da22603cec9f2744e31af0aea89f3c33ad0f0c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEN421105002.
    date published: 2026-07-31T08:26:41Z
  audio: Missa Diligite: Gloria
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 115.227
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.176
    additional property: Energy
      type: PropertyValue
      value: 0.173
    additional property: Speechiness
      type: PropertyValue
      value: 0.043
    additional property: Acousticness
      type: PropertyValue
      value: 0.974
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.032
    additional property: Liveness
      type: PropertyValue
      value: 0.205
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.084
    additional property: Loudness (dB)
      type: PropertyValue
      value: -25.618
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Missa Diligite: Sanctus
  type: MusicRecording
  duration: PT3M5S
  duration ms: 185000
  explicit: false
  by artist: Camargo Guarnieri
  by artist: Apollini et Musis
  by artist: Pia Bohnert
  by artist: Elke Engel
  by artist: Soongoo Lee
  by artist: Thomas Neubauer
  by artist: Vinzenz Weissenburger
  by artist: Jörg Strodthoff
  in album: Saudade - Chormusik aus Brasilien
    type: MusicAlbum
    date published: 2011-10-24
  isrc code: DEN421105003
  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Missa Diligite: Sanctus
track: Suíte Nordestina: 3. Bumba Chora

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-30T18:03:39+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x111128176946280bcb4205cfe13007cae01a8cdde635b504603de564754021fa

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960291

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960291

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN421105003

OTSTimestamp
type: PropertyValue
value: 2026-07-30T18:23:33Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111128176946280bcb4205cfe13007cae01a8cdde635b504603de564754021fa. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN421105003.
date published: 2026-07-30T18:23:33Z

Missa Diligite: Sanctus
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 101.661
additional property: Musical Key
  type: PropertyValue
  value: 9
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 6
additional property: Danceability
  type: PropertyValue
  value: 0.178
additional property: Energy
  type: PropertyValue
  value: 0.247
additional property: Speechiness
  type: PropertyValue
  value: 0.037
additional property: Acousticness
  type: PropertyValue
  value: 0.914
additional property: Instrumentalness
  type: PropertyValue
  value: 0.555
additional property: Liveness
  type: PropertyValue
  value: 0.099
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.066
additional property: Loudness (dB)
  type: PropertyValue
  value: -21.063
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Minor

Suíte Nordestina: 3. Bumba Chora
type: MusicRecording
duration: PT1M54S
duration ms: 114000
explicit: false
by artist: Ronaldo Miranda
by artist: Apollini et Musis
by artist: Vinzenz Weissenburger
by artist: Jörg Strodthoff
in album: Saudade - Chormusik aus Brasilien
  type: MusicAlbum
  date published: 2011-10-24
isrc code: DEN421105011
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T14:23:01+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x93cdba3b1e1ee7e4a41813131fc7fcd9c4a3e1eb374ef690799938476a64c1c5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960418
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960418
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN421105011
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:20:15Z
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 0x93cdba3b1e1ee7e4a41813131fc7fcd9c4a3e1eb374ef690799938476a64c1c5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEN421105011.
  date published: 2026-07-31T15:20:15Z
audio: Suíte Nordestina: 3. Bumba Chora
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.097
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.138
  additional property: Energy
    type: PropertyValue
    value: 0.233
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.36
  additional property: Liveness
    type: PropertyValue
    value: 0.109
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.079
  additional property: Loudness (dB)
    type: PropertyValue
    value: -21.612
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Osvaldo Lacerda - Música de Câmara
type: MusicAlbum
date published: 1999

Fuga Saudosa
type: MusicAlbum
date published: 2022-08-19

Suite Coral N°6
type: MusicAlbum
date published: 2022-08-12

Boi Tungão
type: MusicAlbum
date published: 2022-08-08

Integrais
type: MusicAlbum
date published: 2024-03-15
track: Romanceiro
  type: MusicRecording
  duration: PT2M55S
  duration ms: 175431
  explicit: false
  by artist: Edino Krieger
  by artist: Edelton Gloeden
  in album: Integrais
    type: MusicAlbum
    date published: 2024-03-15
  isrc code: BXSVC2300011
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-19T14:38:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xce39bd793e8b79cc1d257f1d23609e35873875ba52492db9ddca083a3210895e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXSVC2300011
  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 0xce39bd793e8b79cc1d257f1d23609e35873875ba52492db9ddca083a3210895e. 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/BXSVC2300011.
    date published: 2026-07-02T03:30:09Z
  audio: Romanceiro
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 131.31
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.4
    additional property: Energy
      type: PropertyValue
      value: 0.051
    additional property: Speechiness
      type: PropertyValue
      value: 0.059
    additional property: Acousticness
      type: PropertyValue
      value: 0.989
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.944
    additional property: Liveness
      type: PropertyValue
      value: 0.089
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.289
    additional property: Loudness (dB)
      type: PropertyValue
      value: -27.352
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Paisagem Brasileira - Flute and Piano Music from Brazil
type: MusicAlbum
date published: 2000
track: Poemeto
  type: MusicRecording
  duration: PT3M15S
  duration ms: 195906
  explicit: false
  by artist: Osvaldo Lacerda
  by artist: Marcelo Barboza
  by artist: Lídia Bazarian
  in album: Paisagem Brasileira - Flute and Piano Music from Brazil
    type: MusicAlbum
    date published: 2000
  genre: choral
  isrc code: GBABV0611137
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T05:57:22+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe7b5f71791960780734d2fac02f954c32c1dfd3e74d7d4561eb4b81af9129dd8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV0611137
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 0xe7b5f71791960780734d2fac02f954c32c1dfd3e74d7d4561eb4b81af9129dd8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBABV0611137.
    date published: 2026-07-08T03:20:19Z
  audio: Poemeto
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 105.166
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.205
    additional property: Energy
      type: PropertyValue
      value: 0.036
    additional property: Speechiness
      type: PropertyValue
      value: 0.049
    additional property: Acousticness
      type: PropertyValue
      value: 0.985
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.825
    additional property: Liveness
      type: PropertyValue
      value: 0.066
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.096
    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.499
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Margarida: I. Margarida
  type: MusicRecording
  duration: PT2M59S
  duration ms: 179720
  explicit: false
  by artist: Patapio Silva
  by artist: Marcelo Barboza
  by artist: Lídia Bazarian
  in album: Paisagem Brasileira - Flute and Piano Music from Brazil
    type: MusicAlbum
    date published: 2000
  isrc code: GBABV0611145
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T21:29:04+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf6370beff4f77b6d91d6e75da8204a1f2ddcd36797a8fa0c0a8065b4d8231fb5
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960473
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960473
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV0611145
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T22:27:44Z
  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 0xf6370beff4f77b6d91d6e75da8204a1f2ddcd36797a8fa0c0a8065b4d8231fb5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBABV0611145.
    date published: 2026-07-31T22:27:44Z
  audio: Margarida: I. Margarida
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 134.119
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.515
    additional property: Energy
      type: PropertyValue
      value: 0.029
    additional property: Speechiness
      type: PropertyValue
      value: 0.091
    additional property: Acousticness
      type: PropertyValue
      value: 0.976
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.867
    additional property: Liveness
      type: PropertyValue
      value: 0.062
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.5
    additional property: Loudness (dB)
      type: PropertyValue
      value: -29.039
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

The Brazilian Classical Song
type: MusicAlbum
date published: 2015-09-01
track: Lundu da Marquesa de Santos
  type: MusicRecording
  duration: PT2M44S
  duration ms: 164053
  explicit: false
  by artist: Heitor Villa-Lobos
  by artist: Katia Guedes
  by artist: Evelyn Ulex
  in album: The Brazilian Classical Song
    type: MusicAlbum
    date published: 2015-09-01
  isrc code: DENB21510516
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T08:06:46+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf623af9410c20f639b3a49589e25d73b1628f1b266f417b195f4a254d688eb7f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960368
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960368
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DENB21510516
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T08:26:41Z
  additional property: OTSVerifyInstructions
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Musica de América del Sur
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20th Century Music for Solo Flute
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Série Música Brasileira 1
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Chorinho
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O Brasileiro de Sempre
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Fronteras Latinas, Choros, Tangos y Valsas
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Nacionalistas
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Música, Doce Música (Recital)
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Concert d'aujourd hui
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Percussion Solos and Percussion in Chamber Music
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  by artist: Antonio Segafreddo
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XX Century Music for Solo Clarinet
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Canções Brasileiras
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Série Música Brasileira 2
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Brazilian Music for Oboe and Piano
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Brasil Piano
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Brazilian Music for Viola and Piano
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Epigrams
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Musique classique Brésilienne
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O Cravo Brasileiro
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Série Música Brasileira 3
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Prosas
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Cantos de Saudade
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Fuga Saudosa
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Suite Coral N°6
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Boi Tungão
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Brazilian Trombone
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