SOMBRA PR
type: MusicGroup
popularity: 29
followers: 617
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1f1e66235365e98bf5faa02b93ebd3ff6234702ce4a06e82ad53bf388627fd3f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953423
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953423
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/749574a7-877d-4d14-b1c2-a173b3383f7d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/749574a7-877d-4d14-b1c2-a173b3383f7d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/749574a7-877d-4d14-b1c2-a173b3383f7d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T21:20:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1f1e66235365e98bf5faa02b93ebd3ff6234702ce4a06e82ad53bf388627fd3f","name":"SOMBRA PR","registered_at":"2026-06-12T01:08:13Z","symbol":"NIM0151922","token_address":"0x955fadf6fca367ea440414481d290996fc2c5c76","type":"artist","uuid":"749574a7-877d-4d14-b1c2-a173b3383f7d"}
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 0x1f1e66235365e98bf5faa02b93ebd3ff6234702ce4a06e82ad53bf388627fd3f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/749574a7-877d-4d14-b1c2-a173b3383f7d.json and https://artists.proofprofile.net/proofs/artist/749574a7-877d-4d14-b1c2-a173b3383f7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x1f1e66235365e98bf5faa02b93ebd3ff6234702ce4a06e82ad53bf388627fd3f","name":"SOMBRA PR","registered_at":"2026-06-12T01:08:13Z","symbol":"NIM0151922","token_address":"0x955fadf6fca367ea440414481d290996fc2c5c76","type":"artist","uuid":"749574a7-877d-4d14-b1c2-a173b3383f7d"}
album: PRETENDING
  type: MusicAlbum
  date published: 2024-11-15
album: DREAD (Special Version)
  type: MusicAlbum
  date published: 2025-01-08
album: DREAD (Re-mastered)
  type: MusicAlbum
  date published: 2025-01-08
  track: DREAD - Re-mastered
    type: MusicRecording
    duration: PT2M20S
    duration ms: 140736
    explicit: true
    by artist: SOMBRA PR
    in album: DREAD (Re-mastered)
      type: MusicAlbum
      date published: 2025-01-08
    isrc code: QZFYZ2590429
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T11:26:16+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9d74a7dbdecdcb8f3a94d989bca6ea8afdd90c780966ac53b52853a84bc0ddb4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956738
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956738
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYZ2590429
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T04:47:21Z
    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 0x9d74a7dbdecdcb8f3a94d989bca6ea8afdd90c780966ac53b52853a84bc0ddb4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2590429.
      date published: 2026-07-05T04:47:21Z
    audio: DREAD - Re-mastered
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 76.392
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.392
      additional property: Energy
        type: PropertyValue
        value: 0.707
      additional property: Speechiness
        type: PropertyValue
        value: 0.291
      additional property: Acousticness
        type: PropertyValue
        value: 0.702
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.35
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.664
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.862
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: SALGO Y LOS BUSCO (Special version)
  type: MusicAlbum
  date published: 2025-01-10
album: Otro Muerto
  type: MusicAlbum
  date published: 2025-04-25
  track: Otro Muerto
    type: MusicRecording
    duration: PT3M39S
    duration ms: 219753
    explicit: true
    by artist: SOMBRA PR
    in album: Otro Muerto
      type: MusicAlbum
      date published: 2025-04-25
    isrc code: QZNWS2581868
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-13T01:18:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4b98aee931b796e74cdbf5f2dc077c0d0d18d6d3898921d173c78b7a2bb1d423
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957788
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957788
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2581868
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T02:37:37Z
    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 0x4b98aee931b796e74cdbf5f2dc077c0d0d18d6d3898921d173c78b7a2bb1d423. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWS2581868.
      date published: 2026-07-13T02:37:37Z
    audio: Otro Muerto
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.916
      additional property: Musical Key
        type: PropertyValue
        value: 4
      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: 0.654
      additional property: Speechiness
        type: PropertyValue
        value: 0.302
      additional property: Acousticness
        type: PropertyValue
        value: 0.21
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.281

Valence (Positivity)
type: PropertyValue
value: 0.449

Loudness (dB)
type: PropertyValue
value: -7.656

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Major