dr keff
type: MusicGroup
popularity: 8
followers: 53
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8764d977d370dd070a57c2ec7057232de64fa5462d04ffe7f2702721c4828b86
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd57fddc-d17f-48af-aff1-642844c9b25a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fd57fddc-d17f-48af-aff1-642844c9b25a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fd57fddc-d17f-48af-aff1-642844c9b25a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8764d977d370dd070a57c2ec7057232de64fa5462d04ffe7f2702721c4828b86","name":"dr keff","registered_at":"2026-06-21T17:37:47Z","symbol":"NIM1989336","token_address":"0x09c315f6a8d641dfe810c1982a8a9e1523240b68","type":"artist","uuid":"fd57fddc-d17f-48af-aff1-642844c9b25a"}
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 0x8764d977d370dd070a57c2ec7057232de64fa5462d04ffe7f2702721c4828b86. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd57fddc-d17f-48af-aff1-642844c9b25a.json and https://artists.proofprofile.net/proofs/artist/fd57fddc-d17f-48af-aff1-642844c9b25a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0x8764d977d370dd070a57c2ec7057232de64fa5462d04ffe7f2702721c4828b86","name":"dr keff","registered_at":"2026-06-21T17:37:47Z","symbol":"NIM1989336","token_address":"0x09c315f6a8d641dfe810c1982a8a9e1523240b68","type":"artist","uuid":"fd57fddc-d17f-48af-aff1-642844c9b25a"}
album: CIBERNETICO
  type: MusicAlbum
  date published: 2024-04-09
album: PLUG PRA ELAS
  type: MusicAlbum
  date published: 2024-07-31
track: Adeus
  type: MusicRecording
  duration: PT2M38S
  duration ms: 158900
  explicit: false
  by artist: Viktor Vercetti
  by artist: Troy
  by artist: dr keff
  in album: Último Ano Pobre Mixxtape
    type: MusicAlbum
    date published: 2024-05-15
  genre: detroit-trap-brasileiro
  isrc code: BXIV82437896
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-20T11:14:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x82ba728a0beb5d1608fb9f523872d7cf0fbc1c41c6b4a249ee63cb16b74fe421
  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/BXIV82437896
  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 0x82ba728a0beb5d1608fb9f523872d7cf0fbc1c41c6b4a249ee63cb16b74fe421. 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/BXIV82437896.
    date published: 2026-07-02T03:30:09Z
  audio: Adeus
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 101.721
    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: 0.494
    additional property: Energy
      type: PropertyValue
      value: 0.71
    additional property: Speechiness
      type: PropertyValue
      value: 0.225
    additional property: Acousticness
      type: PropertyValue
      value: 0.14
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.316
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.188
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.54
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: LEVA A SÉRIO
  type: MusicRecording
  duration: PT3M3S
  duration ms: 183222
  explicit: false
  by artist: BEBELSITO TREM
  by artist: DoysL
  by artist: dr keff
  in album: THRILLER SEXTAPE
    type: MusicAlbum
    date published: 2024-09-13
  isrc code: BXIV82481765
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-22T06:18:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xaea8c104ae4c3edf22b4b2a9e1e5f929697049096d8d5e1a709b8d13e77c09ce
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959105
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959105
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82481765
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T06:33:30Z
  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 0xaea8c104ae4c3edf22b4b2a9e1e5f929697049096d8d5e1a709b8d13e77c09ce. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BXIV82481765.
    date published: 2026-07-22T06:33:30Z
  audio: LEVA A SÉRIO
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 152.025
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.722
    additional property: Energy
      type: PropertyValue
      value: 0.431
    additional property: Speechiness
      type: PropertyValue
      value: 0.295
    additional property: Acousticness
      type: PropertyValue
      value: 0.004
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: SEM LIMITAÇÃO

Liveness
type: PropertyValue
value: 0.171

Valence (Positivity)
type: PropertyValue
value: 0.188

Loudness (dB)
type: PropertyValue
value: -9.361

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

SEM LIMITAÇÃO
type: MusicRecording
duration: PT3M33S
duration ms: 213864
explicit: false
by artist: BEBELSITO TREM
by artist: dr keff
by artist: DoysL
by artist: DonKblean
in album: THRILLER SEXTAPE
  type: MusicAlbum
  date published: 2024-09-13
isrc code: BXIV82492999
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T02:55:25+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xffc92ff082c1a850291f7d830741df9628dc404742cfd1b042d7f29c35d56c21
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/BXIV82492999
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 0xffc92ff082c1a850291f7d830741df9628dc404742cfd1b042d7f29c35d56c21. 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/BXIV82492999.
  date published: 2026-07-08T03:20:19Z
audio: SEM LIMITAÇÃO
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.683
  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: 0.862
  additional property: Energy
    type: PropertyValue
    value: 0.451
  additional property: Speechiness
    type: PropertyValue
    value: 0.351
  additional property: Acousticness
    type: PropertyValue
    value: 0.074
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.17
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.466
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.989
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major