Def
type: MusicGroup
genre: midwest emo
genre: shoegaze
description: Def or DEF may refer to: Music Def (instrument), a Middle Eastern musical instrument DEF II, a British youth TV programme Def American, a rock and rap record label Def Jam Recordings, a rap recor
popularity: 10
followers: 2337
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3aa4d4a3d329092557b12c478f227577346e74c5caed344c08f2d02fdc721248
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954593
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954593
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bde11975-e362-4da0-8be2-de50a6520a5f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bde11975-e362-4da0-8be2-de50a6520a5f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bde11975-e362-4da0-8be2-de50a6520a5f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:46:01Z
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 0x3aa4d4a3d329092557b12c478f227577346e74c5caed344c08f2d02fdc721248. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bde11975-e362-4da0-8be2-de50a6520a5f.json and https://artists.proofprofile.net/proofs/artist/bde11975-e362-4da0-8be2-de50a6520a5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:46:01Z
album: Sobre os Prédios Que Derrubei Tentando Salvar o Dia (Parte 1)
  type: MusicAlbum
  date published: 2016-06-20
  track: Sobremesa
    type: MusicRecording
    duration: PT2M55S
    duration ms: 175738
    explicit: false
    by artist: Def
    in album: Sobre os Prédios Que Derrubei Tentando Salvar o Dia (Parte 1)
      type: MusicAlbum
      date published: 2016-06-20
    genre: midwest emo
    genre: shoegaze
    isrc code: US7VG1663925
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T02:12:46+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe8ca1fdd2623a0b2c049bef89e9ec0816b203e68a9ee6bb5a1da218b0d3e60c5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958805
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958805
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1663925
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T02:22:58Z
    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 0xe8ca1fdd2623a0b2c049bef89e9ec0816b203e68a9ee6bb5a1da218b0d3e60c5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/US7VG1663925.
      date published: 2026-07-20T02:22:58Z
    audio: Sobremesa
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 155.07
      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: 0.406
      additional property: Energy
        type: PropertyValue
        value: 0.796
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.011
      additional property: Liveness
        type: PropertyValue
        value: 0.244
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.478
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.942
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Sobre os Prédios Que Derrubei Tentando Salvar o Dia (Parte 2)
  type: MusicAlbum
  date published: 2019-09-30
  track: Alarmes de Incêndio
    type: MusicRecording
    duration: PT5M31S
    duration ms: 331578
    explicit: false
    by artist: Def
    in album: Sobre os Prédios Que Derrubei Tentando Salvar o Dia (Parte 2)
      type: MusicAlbum
      date published: 2019-09-30
    genre: midwest emo
    genre: shoegaze
    isrc code: BXD6B1900001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T19:58:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7334fc3f2d4269aaac1d7635c4ed4ef5cc64e9a0fbc2e8854f082b360b0d9d13
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXD6B1900001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x7334fc3f2d4269aaac1d7635c4ed4ef5cc64e9a0fbc2e8854f082b360b0d9d13. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXD6B1900001.
      date published: 2026-07-05T01:12:41Z
    audio: Alarmes de Incêndio
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 150.088
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.468
      additional property: Energy
        type: PropertyValue
        value: 0.92
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.007
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.233
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: A Cidade Onde Apenas Eu Não Existo

Liveness
type: PropertyValue
value: 0.092

Valence (Positivity)
type: PropertyValue
value: 0.5

Loudness (dB)
type: PropertyValue
value: -6.701

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

A Cidade Onde Apenas Eu Não Existo
type: MusicRecording
duration: PT3M48S
duration ms: 228883
explicit: false
by artist: Def
in album: Sobre os Prédios Que Derrubei Tentando Salvar o Dia (Parte 2)
  type: MusicAlbum
  date published: 2019-09-30
genre: midwest emo
genre: shoegaze
isrc code: BXD6B1900009
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-15T05:23:28+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x41cf1825f02f3674b39ff3cdf2b737999dab87dff07ff021988c96d1099b373b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958106
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958106
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXD6B1900009
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-15T05:35:13Z
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 0x41cf1825f02f3674b39ff3cdf2b737999dab87dff07ff021988c96d1099b373b. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/BXD6B1900009.
  date published: 2026-07-15T05:35:13Z
audio: A Cidade Onde Apenas Eu Não Existo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 153.91
  additional property: Musical Key
    type: PropertyValue
    value: 11
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.504
  additional property: Energy
    type: PropertyValue
    value: 0.882
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.051
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.061
  additional property: Liveness
    type: PropertyValue
    value: 0.477
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.588
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.349
  additional property: Key Name
    type: PropertyValue
    value: B
  additional property: Mode Name
    type: PropertyValue
    value: Major