Ducca
type: MusicGroup
popularity: 21
followers: 203
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x693cf089e81836857dd2fa7a093cf355bda65e4d5c0500f17d71fd4749ffbcb7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c8dcfc68-b558-4c17-8768-a954bbb5b5e6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c8dcfc68-b558-4c17-8768-a954bbb5b5e6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c8dcfc68-b558-4c17-8768-a954bbb5b5e6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
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 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 0x693cf089e81836857dd2fa7a093cf355bda65e4d5c0500f17d71fd4749ffbcb7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8dcfc68-b558-4c17-8768-a954bbb5b5e6.json and https://artists.proofprofile.net/proofs/artist/c8dcfc68-b558-4c17-8768-a954bbb5b5e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
album: Realidade Oposta
  type: MusicAlbum
  date published: 2021-02-12
album: Conto de Fadas
  type: MusicAlbum
  date published: 2021-07-30
album: Bandida Treinada
  type: MusicAlbum
  date published: 2022-04-08
album: Pede +
  type: MusicAlbum
  date published: 2022-08-19
album: SHORTIN DA SHEIN
  type: MusicAlbum
  date published: 2024-01-12
album: Se Tem o Dom
  type: MusicAlbum
  date published: 2024-06-07
album: Open De Mulher
  type: MusicAlbum
  date published: 2024-06-21
album: Hora do Love
  type: MusicAlbum
  date published: 2024-08-23
album: Apitou,Tá Valendo
  type: MusicAlbum
  date published: 2024-12-06
  track: Apitou,Tá Valendo
    type: MusicRecording
    duration: PT1M32S
    duration ms: 92307
    explicit: false
    by artist: Ducca
    in album: Apitou,Tá Valendo
      type: MusicAlbum
      date published: 2024-12-06
    isrc code: QMDA72490617
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-02T22:26:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x616e109865ec54b4d7653e0eefaa7b1e2f915eb8ccefea8eb7f39935386a60d7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956420
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956420
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72490617
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T00:42:11Z
    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 0x616e109865ec54b4d7653e0eefaa7b1e2f915eb8ccefea8eb7f39935386a60d7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA72490617.
      date published: 2026-07-03T00:42:11Z
    audio: Apitou,Tá Valendo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.459
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.699
      additional property: Energy
        type: PropertyValue
        value: 0.569
      additional property: Speechiness
        type: PropertyValue
        value: 0.283
      additional property: Acousticness
        type: PropertyValue
        value: 0.317
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.168
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.836
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.345
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Bailarina
  type: MusicAlbum
  date published: 2025-02-21
album: O QUE É , O QUE É ?
  type: MusicAlbum
  date published: 2025-05-02
  track: O QUE É , O QUE É ?
    type: MusicRecording
    duration: PT1M57S
    duration ms: 117182
    explicit: false
    by artist: Ducca
    in album: O QUE É , O QUE É ?
      type: MusicAlbum
      date published: 2025-05-02
    isrc code: BCSNT2500005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T09:38:47+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3b9a57ee38dffcf4dd04f9e48dcffb2d142a5a6599d0793e2b643e8a40e68850
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958538
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958538
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSNT2500005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T10:30:13Z
    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 0x3b9a57ee38dffcf4dd04f9e48dcffb2d142a5a6599d0793e2b643e8a40e68850. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BCSNT2500005.
      date published: 2026-07-18T10:30:13Z
    audio: O QUE É , O QUE É ?
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.924
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
      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
album: Vida Cara

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.898

Energy
type: PropertyValue
value: 0.429

Speechiness
type: PropertyValue
value: 0.1

Acousticness
type: PropertyValue
value: 0.344

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.239

Valence (Positivity)
type: PropertyValue
value: 0.893

Loudness (dB)
type: PropertyValue
value: -9.052

Key Name
type: PropertyValue
value: F#

Mode Name
type: PropertyValue
value: Minor

Vida Cara
type: MusicAlbum
date published: 2025-08-15