Big Chess
type: MusicGroup
genre: grime
popularity: 6
followers: 170
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x91735e7074408e4ac1add331d90034af90dddafdf48c3a91f3e615df79d3665a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2efda27d-cd4a-4712-b5cd-73a0e2bf134b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2efda27d-cd4a-4712-b5cd-73a0e2bf134b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2efda27d-cd4a-4712-b5cd-73a0e2bf134b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x91735e7074408e4ac1add331d90034af90dddafdf48c3a91f3e615df79d3665a","name":"Big Chess","registered_at":"2026-06-16T05:58:45Z","symbol":"NIM0959065","token_address":"0xc72cf616010abca9ed90fbe97d8d8876a2823c6d","type":"artist","uuid":"2efda27d-cd4a-4712-b5cd-73a0e2bf134b"}
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 0x91735e7074408e4ac1add331d90034af90dddafdf48c3a91f3e615df79d3665a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2efda27d-cd4a-4712-b5cd-73a0e2bf134b.json and https://artists.proofprofile.net/proofs/artist/2efda27d-cd4a-4712-b5cd-73a0e2bf134b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x91735e7074408e4ac1add331d90034af90dddafdf48c3a91f3e615df79d3665a","name":"Big Chess","registered_at":"2026-06-16T05:58:45Z","symbol":"NIM0959065","token_address":"0xc72cf616010abca9ed90fbe97d8d8876a2823c6d","type":"artist","uuid":"2efda27d-cd4a-4712-b5cd-73a0e2bf134b"}
track: Facts
  type: MusicRecording
  duration: PT4M15S
  duration ms: 255320
  explicit: false
  by artist: Blade Brown
  by artist: Mental K
  by artist: Big Chess
  in album: Bags and Boxes 3
    type: MusicAlbum
    date published: 2014-10-31
  isrc code: TCACA1441962
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-25T08:23:26+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x55b4876591a47a53a1a2bf82518e618a0473ff50011670677ca812dffc6a7473
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACA1441962
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0x55b4876591a47a53a1a2bf82518e618a0473ff50011670677ca812dffc6a7473. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACA1441962.
    date published: 2026-07-02T03:55:08Z
  audio: Facts
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 146.266
    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.509
    additional property: Energy
      type: PropertyValue
      value: 0.634
    additional property: Speechiness
      type: PropertyValue
      value: 0.361
    additional property: Acousticness
      type: PropertyValue
      value: 0.103
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.244
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.527
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.661
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major