Filter Four
type: MusicGroup
popularity: 3
followers: 144
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2480cebefb0801fee33c271b1d8d7f1c0d1ba44efcd6774f6ab30da6454c1fcf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2480cebefb0801fee33c271b1d8d7f1c0d1ba44efcd6774f6ab30da6454c1fcf","name":"Filter Four","registered_at":"2026-06-16T16:44:50Z","symbol":"NIM1113237","token_address":"0xb0a287e3f945806eb85fa2342b712f0f1190efcc","type":"artist","uuid":"4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53"}
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 0x2480cebefb0801fee33c271b1d8d7f1c0d1ba44efcd6774f6ab30da6454c1fcf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53.json and https://artists.proofprofile.net/proofs/artist/4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x2480cebefb0801fee33c271b1d8d7f1c0d1ba44efcd6774f6ab30da6454c1fcf","name":"Filter Four","registered_at":"2026-06-16T16:44:50Z","symbol":"NIM1113237","token_address":"0xb0a287e3f945806eb85fa2342b712f0f1190efcc","type":"artist","uuid":"4db44a7e-b1c6-4ba6-8d12-6c1a0d1dce53"}
album: I Don't Really Know What Films You Like
  type: MusicAlbum
  date published: 2025-01-01
  track: I Don't Really Know What Films You Like - Live
    type: MusicRecording
    duration: PT3M20S
    duration ms: 200063
    explicit: false
    by artist: Filter Four
    in album: I Don't Really Know What Films You Like
      type: MusicAlbum
      date published: 2025-01-01
    isrc code: QT3F22464721
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T05:16:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x858dd1833a073f1c072b003b9541d8891569437d464a1c6ae3837caa4abdca77
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22464721
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0x858dd1833a073f1c072b003b9541d8891569437d464a1c6ae3837caa4abdca77. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F22464721.
      date published: 2026-07-06T06:56:49Z
    audio: I Don't Really Know What Films You Like - Live
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 144.231
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.464
      additional property: Energy
        type: PropertyValue
        value: 0.925
      additional property: Speechiness
        type: PropertyValue
        value: 0.054
      additional property: Acousticness
        type: PropertyValue
        value: 0.003
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.058
      additional property: Liveness
        type: PropertyValue
        value: 0.236
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.662
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.297
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Bella
  type: MusicAlbum
  date published: 2025-05-28
album: Bella
  type: MusicAlbum
  date published: 2025-07-21