SEFF
type: MusicGroup
genre: tech house
popularity: 4
followers: 925
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbe2d640b4fe49ca6ff2540a11eecf047452517a7385ffd3a768a5bb26223ac13
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d1cf1d10-7f67-4bea-86cd-e1d8e142ab9c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d1cf1d10-7f67-4bea-86cd-e1d8e142ab9c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d1cf1d10-7f67-4bea-86cd-e1d8e142ab9c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
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 0xbe2d640b4fe49ca6ff2540a11eecf047452517a7385ffd3a768a5bb26223ac13. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1cf1d10-7f67-4bea-86cd-e1d8e142ab9c.json and https://artists.proofprofile.net/proofs/artist/d1cf1d10-7f67-4bea-86cd-e1d8e142ab9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
album: Hustle / More Time
  type: MusicAlbum
  date published: 2012-02-24
album: El Lado Oscuro EP
  type: MusicAlbum
  date published: 2012-12-10
album: El Lado Oscuro EP
  type: MusicAlbum
  date published: 2012-12-10
album: Make More Noise EP
  type: MusicAlbum
  date published: 2013-03-21
album: Get Ya
  type: MusicAlbum
  date published: 2013-08-15
album: Freestyle Fanatic Ep
  type: MusicAlbum
  date published: 2013-12-16
album: Freestyle Fanatic
  type: MusicAlbum
  date published: 2013-12-16
album: Samsara EP
  type: MusicAlbum
  date published: 2014-02-03
album: In The Air EP
  type: MusicAlbum
  date published: 2014-04-21
album: In the Air
  type: MusicAlbum
  date published: 2014-04-21
album: Blue Room / Block Party
  type: MusicAlbum
  date published: 2015-01-01
album: Jack's Back
  type: MusicAlbum
  date published: 2015-02-16
album: Jack's Back
  type: MusicAlbum
  date published: 2015-02-16
album: Power Up EP
  type: MusicAlbum
  date published: 2015-04-13
album: Power Up EP
  type: MusicAlbum
  date published: 2015-04-13
album: See You Dance EP
  type: MusicAlbum
  date published: 2015-08-17
album: See You Dance EP
  type: MusicAlbum
  date published: 2015-08-17
album: See You Dance EP
  type: MusicAlbum
  date published: 2015-08-31
album: Can I
  type: MusicAlbum
  date published: 2015-11-09
album: Warehouse
  type: MusicAlbum
  date published: 2015-11-23
album: Get A Hit
  type: MusicAlbum
  date published: 2016-10-10
album: Needle to the Groove
  type: MusicAlbum
  date published: 2018-06-29
album: Reach EP
  type: MusicAlbum
  date published: 2018-06-29
album: Needle To The Groove
  type: MusicAlbum
  date published: 2018-06-29
album: Return to the Hood
  type: MusicAlbum
  date published: 2018-07-20
album: Braindance
  type: MusicAlbum
  date published: 2018-08-17
album: Braindance
  type: MusicAlbum
  date published: 2018-09-14
track: Braindance - Raffa FL Remix (Mixed)
  type: MusicRecording
  duration: PT3M10S
  duration ms: 190322
  explicit: false
  by artist: SEFF
  by artist: Raffa Fl
  in album: Toolroom Amsterdam 2018 (Mixed By Mark Knight)
    type: MusicAlbum
    date published: 2018-10-12
  isrc code: GBJAJ1801643
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T16:50:29+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc1e420df2907f54416d1c7597d0e75a03e38c94bf30585596ea031ffb08a6f6b
  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/GBJAJ1801643
  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 0xc1e420df2907f54416d1c7597d0e75a03e38c94bf30585596ea031ffb08a6f6b. 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/GBJAJ1801643.
    date published: 2026-07-08T03:20:19Z
  audio: Braindance - Raffa FL Remix (Mixed)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 177.323
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.433
    additional property: Energy
      type: PropertyValue
      value: 0.707
    additional property: Speechiness
      type: PropertyValue
      value: 0.063
    additional property: Acousticness
      type: PropertyValue
      value: 0.01
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.83
    additional property: Liveness
      type: PropertyValue
      value: 0.077
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.155
    additional property: Loudness (dB)
      type: PropertyValue
      value: -16.971
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major