Topback
type: MusicGroup
genre: chillstep
genre: witch house
popularity: 5
followers: 253
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xac856911f4c9330444e3542226be5313c3ab3a17cf4394b1cc78ec69fe0e2c59
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/cdd38909-93b8-420c-aacb-052edf230f47.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cdd38909-93b8-420c-aacb-052edf230f47.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cdd38909-93b8-420c-aacb-052edf230f47
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac856911f4c9330444e3542226be5313c3ab3a17cf4394b1cc78ec69fe0e2c59. 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/cdd38909-93b8-420c-aacb-052edf230f47.json and https://artists.proofprofile.net/proofs/artist/cdd38909-93b8-420c-aacb-052edf230f47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
album: Bathing
  type: MusicAlbum
  date published: 2014-06-26
album: Labyrinthia
  type: MusicAlbum
  date published: 2018-09-28
album: Fuji Film
  type: MusicAlbum
  date published: 2019-08-02
album: Evolve
  type: MusicAlbum
  date published: 2019-11-08
album: Ivory
  type: MusicAlbum
  date published: 2020-02-14
  track: Ivory
    type: MusicRecording
    duration: PT3M1S
    duration ms: 181153
    explicit: false
    by artist: Topback
    in album: Ivory
      type: MusicAlbum
      date published: 2020-02-14
    genre: chillstep
    genre: witch house
    isrc code: TCAEQ2042337
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T23:16:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe7ef37cd8689afe41e28a715fc4664cd3dbc29af8786b6938269d49afdc17f29
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEQ2042337
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0xe7ef37cd8689afe41e28a715fc4664cd3dbc29af8786b6938269d49afdc17f29. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEQ2042337.
      date published: 2026-07-04T11:19:20Z
    audio: Ivory
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.034
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.47
      additional property: Energy
        type: PropertyValue
        value: 0.403
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.824
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.828
      additional property: Liveness
        type: PropertyValue
        value: 0.119
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.038
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.533
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Cancel Culture
  type: MusicAlbum
  date published: 2020-06-26
album: Fearless
  type: MusicAlbum
  date published: 2021-02-26
album: Sunday
  type: MusicAlbum
  date published: 2021-05-28
album: Ivory (Future Garage Remix)
  type: MusicAlbum
  date published: 2021-05-28
album: What Even
  type: MusicAlbum
  date published: 2021-09-24
album: Ether
  type: MusicAlbum
  date published: 2022-01-28
album: Labyrinth
  type: MusicAlbum
  date published: 2022-06-03
album: Hinder
  type: MusicAlbum
  date published: 2022-09-30