Guilherme Lacerda
type: MusicGroup
genre: samba
popularity: 3
followers: 372
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x230a30abf61d627b778d6d43f4da19f249a40b41e2f746e18bcd56c933363c92
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73777049-396e-4507-bc7b-c1294f6b61cd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73777049-396e-4507-bc7b-c1294f6b61cd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/73777049-396e-4507-bc7b-c1294f6b61cd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x230a30abf61d627b778d6d43f4da19f249a40b41e2f746e18bcd56c933363c92","name":"Guilherme Lacerda","registered_at":"2026-06-17T05:52:38Z","symbol":"NIM1301214","token_address":"0xb79432f00468ff38e9ef11a2a88c92bb4dcdb477","type":"artist","uuid":"73777049-396e-4507-bc7b-c1294f6b61cd"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230a30abf61d627b778d6d43f4da19f249a40b41e2f746e18bcd56c933363c92. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73777049-396e-4507-bc7b-c1294f6b61cd.json and https://artists.proofprofile.net/proofs/artist/73777049-396e-4507-bc7b-c1294f6b61cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x230a30abf61d627b778d6d43f4da19f249a40b41e2f746e18bcd56c933363c92","name":"Guilherme Lacerda","registered_at":"2026-06-17T05:52:38Z","symbol":"NIM1301214","token_address":"0xb79432f00468ff38e9ef11a2a88c92bb4dcdb477","type":"artist","uuid":"73777049-396e-4507-bc7b-c1294f6b61cd"}
album: Sorrindo de Canto em Canto
  type: MusicAlbum
  date published: 1900-01-01
album: Partido da Vila - Bloco Amigos da Vila Mariana (5 Anos)
  type: MusicAlbum
  date published: 2006-01-18
album: Ponto de Vista
  type: MusicAlbum
  date published: 2009-02-03
album: Nosso Samba Vai Além
  type: MusicAlbum
  date published: 2009-06-15
album: Canto Pra Nação
  type: MusicAlbum
  date published: 2013-01-01
album: Canto pra Nação
  type: MusicAlbum
  date published: 2013-01-21
album: Atalho
  type: MusicAlbum
  date published: 2017-03-11
  track: Já Foi Meu Carnaval
  track: Game Over
  track: Velhos Tempos
album: Morocha Linda
  type: MusicAlbum
  date published: 2017-11-27
album: Lona do Telhado
  type: MusicAlbum
  date published: 2017-12-02
album: Bordado da Cortina
  type: MusicAlbum
  date published: 2017-12-02
album: Samba 2018 - Bloco Amigos da Vila Mariana
  type: MusicAlbum
  date published: 2018-01-01
album: Samba 2018 - Bloco Amigos da Vila Mariana
  type: MusicAlbum
  date published: 2018-01-01
album: Guilherme Lacerda - ao Vivo
  type: MusicAlbum
  date published: 2019-01-18
album: Coração BrasilCubano
  type: MusicAlbum
  date published: 2019-10-02
album: Destino de Vacilão
  type: MusicAlbum
  date published: 2020-10-01
album: Bordado da Cortina
  type: MusicAlbum
  date published: 2020-11-11
album: Me Chamam, Mendigo
  type: MusicAlbum
  date published: 2023-01-20
album: O Samba Parou
  type: MusicAlbum
  date published: 2023-05-26
album: Bloco Amigos da Vila Mariana - 2025, eu to ai de novo... No Carnaval da Vila, Silvio Santos vem aí
  type: MusicAlbum
  date published: 2025-02-20
album: A Poesia das Estrelas
  type: MusicAlbum
  date published: 2025-02-27
album: A Madrugada
  type: MusicAlbum
  date published: 2025-09-30

Já Foi Meu Carnaval
type: MusicRecording
duration: PT3M0S
duration ms: 180000
explicit: false
by artist: Guilherme Lacerda
in album: Atalho
  type: MusicAlbum
  date published: 2017-03-11
genre: samba
isrc code: BRGAK1600007
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T19:46:44+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3bae42d6f970b445b407f91162d3f807631f42b80aca5259263b9376c9364fd0
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/BRGAK1600007
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957118
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bae42d6f970b445b407f91162d3f807631f42b80aca5259263b9376c9364fd0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRGAK1600007.
  date published: 2026-07-08T03:22:41Z
audio: Já Foi Meu Carnaval
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 107.727
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.64
  additional property: Energy
    type: PropertyValue
    value: 0.584
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.684
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.253
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.939
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.206
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Major

Game Over
type: MusicRecording
duration: PT4M5S
duration ms: 245000
explicit: false
by artist: Guilherme Lacerda
in album: Atalho
  type: MusicAlbum
  date published: 2017-03-11
genre: samba
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31822083eeaa58ff9e7e5a53fc5254fa3db61ef6a6da8c2cc5ce8d5cbd177730. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRGAK1600003.
  date published: 2026-08-01T03:13:03Z
audio: Game Over
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 107.051
  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: 0.727
  additional property: Energy
    type: PropertyValue
    value: 0.673
  additional property: Speechiness
    type: PropertyValue
    value: 0.101
  additional property: Acousticness
    type: PropertyValue
    value: 0.622
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.042
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.968
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.153
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: BRGAK1600003
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960500
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-08-01T03:13:03+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGAK1600003
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960500
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T03:13:03+00:00
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

Velhos Tempos
type: MusicRecording
duration: PT4M20S
duration ms: 260000
explicit: false
by artist: Guilherme Lacerda
in album: Atalho
  type: MusicAlbum
  date published: 2017-03-11
genre: samba
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f6253f0258ba5a2a7effc7332feeb9b1b6b3c1f72367bb852eeb359e8c260d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRGAK1600018.
  date published: 2026-07-31T13:50:38Z
audio: Velhos Tempos
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 99.178
  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: 0.502
  additional property: Energy
    type: PropertyValue
    value: 0.556
  additional property: Speechiness
    type: PropertyValue
    value: 0.052
  additional property: Acousticness
    type: PropertyValue
    value: 0.779
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.215
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.844
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.359
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: BRGAK1600018
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960410
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T13:50:38+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRGAK1600018
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960410
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960410
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:50:38+00:00
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