Lacerda
type: MusicGroup
genre: brazilian bass
description: Lacerda is a Portuguese language surname branched from the castilan House of la Cerda. Notable persons with that name include: Alberto de Lacerda (1928–2007), Portuguese poet and radio presenter Carl
popularity: 18
followers: 677
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSTimestamp
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  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
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 0xe211e8b8bf8f7306a81a2246d7e6b1859413d37d87552104fce52d16b88a9203. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8111ff-a442-469e-a7c0-ffbe43038ba7.json and https://artists.proofprofile.net/proofs/artist/eb8111ff-a442-469e-a7c0-ffbe43038ba7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:22:30Z
album: Sem Sentimento
  type: MusicAlbum
  date published: 2023-10-23
album: Plucked
  type: MusicAlbum
  date published: 2023-06-23
album: Phoenix Reloaded (Radio Edit)
  type: MusicAlbum
  date published: 2021-11-16
album: My Way
  type: MusicAlbum
  date published: 2021-10-22
album: Piece of Mind
  type: MusicAlbum
  date published: 2021-09-17
album: Smack That RMX
  type: MusicAlbum
  date published: 2021-08-20
  track: Smack That RMX - Extended Mix
    type: MusicRecording
    duration: PT4M13S
    duration ms: 253744
    explicit: false
    by artist: Lemex
    by artist: Lacerda
    in album: Smack That RMX
      type: MusicAlbum
      date published: 2021-08-20
    isrc code: GBKQU2184926
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    additional property: CopyrightStatus
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      value: registered
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-06-13T17:25:41Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3421cdb5adb22c14c499a43ef5a16ba8f3f9b2e614b8759fcfb308ebaa4d58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2184926.
      date published: 2026-06-13T17:25:41Z
    audio: Smack That RMX - Extended Mix
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.007
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.915
      additional property: Energy
        type: PropertyValue
        value: 0.526
      additional property: Speechiness
        type: PropertyValue
        value: 0.066
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.13
      additional property: Liveness
        type: PropertyValue
        value: 0.044
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.4
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.584
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
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album: Lose
  type: MusicAlbum
  date published: 2021-07-22
album: Flexiona
  type: MusicAlbum
  date published: 2021-05-03
  track: Flexiona
album: To Move
  type: MusicAlbum
  date published: 2021-04-19
album: Danca Conmigo
  type: MusicAlbum
  date published: 2020-03-30
  track: Danca Conmigo
    type: MusicRecording
    duration: PT4M21S
    duration ms: 261270
    explicit: false
    by artist: Lacerda
    in album: Danca Conmigo
      type: MusicAlbum
      date published: 2020-03-30
    isrc code: DEH742004830
    additional property: CopyrightID
    additional property: CopyrightStatus
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      value: registered
    additional property: CopyrightRegisteredAt
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
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    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81822740f7c0f82dab088543ee63159bd20c499ab6232620ae4d7dc827bed1a8. 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/DEH742004830.
      date published: 2026-07-08T03:20:19Z
    audio: Danca Conmigo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 134.301
      additional property: Musical Key
        type: PropertyValue
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      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
track: Smack That RMX - Extended Mix

Flexiona
type: MusicRecording
duration: PT3M8S
duration ms: 188571
explicit: false
by artist: Lemex
by artist: Lacerda
by artist: Green Deep
in album: Flexiona
  type: MusicAlbum
  date published: 2021-05-03
isrc code: DEH742157617
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T17:25:41Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cb8810ce63c3eafd97216a52d38c4cbc86a242bfef50c70cbb97083f8ec48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742157617.
  date published: 2026-06-13T17:25:41Z
audio: Flexiona
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 135.772
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.903
  additional property: Energy
    type: PropertyValue
    value: 0.692
  additional property: Speechiness
    type: PropertyValue
    value: 0.304
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
    value: 0.155
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.433
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Mode (Major/Minor)
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value: 1

Time Signature
type: PropertyValue
value: 5

Danceability
type: PropertyValue
value: 0.952

Energy
type: PropertyValue
value: 0.484

Speechiness
type: PropertyValue
value: 0.116

Acousticness
type: PropertyValue
value: 0.003

Instrumentalness
type: PropertyValue
value: 0.804

Liveness
type: PropertyValue
value: 0.089

Valence (Positivity)
type: PropertyValue
value: 0.494

Loudness (dB)
type: PropertyValue
value: -7.974

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Smack That RMX - Extended Mix
type: MusicRecording
duration: PT4M13S
duration ms: 253744
explicit: false
by artist: Lemex
by artist: Lacerda
in album: Bass Selections, Vol. 06
  type: MusicAlbum
  date published: 2022-11-07
popularity: 1
isrc code: GBKQU2184926
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-06-07T21:37:56+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3421cdb5adb22c14c499a43ef5a16ba8f3f9b2e614b8759fcfb308ebaa4d58. 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/GBKQU2184926.
  date published: 2026-07-08T03:22:41Z
audio: Smack That RMX - Extended Mix
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 135.007
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.915
  additional property: Energy
    type: PropertyValue
    value: 0.526
  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.13
  additional property: Liveness
    type: PropertyValue
    value: 0.044
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.4
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.584
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major