Master of Classic
type: MusicGroup
popularity: 8
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x18fa4da03786a07a778d943425f604b7046e1a7625f61c870c62266d7944157e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954580
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954580
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7e89f6d-cc89-4bdd-81a8-a13344e166ed.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7e89f6d-cc89-4bdd-81a8-a13344e166ed.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b7e89f6d-cc89-4bdd-81a8-a13344e166ed
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T17:48:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x18fa4da03786a07a778d943425f604b7046e1a7625f61c870c62266d7944157e","name":"Master of Classic","registered_at":"2026-06-20T15:23:29Z","symbol":"NIM1643711","token_address":"0x3c1d3c302d2ec016fa9e2b3d091e044fb4a2a8cd","type":"artist","uuid":"b7e89f6d-cc89-4bdd-81a8-a13344e166ed"}
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 0x18fa4da03786a07a778d943425f604b7046e1a7625f61c870c62266d7944157e. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7e89f6d-cc89-4bdd-81a8-a13344e166ed.json and https://artists.proofprofile.net/proofs/artist/b7e89f6d-cc89-4bdd-81a8-a13344e166ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
  text: {"copyright_id":"0x18fa4da03786a07a778d943425f604b7046e1a7625f61c870c62266d7944157e","name":"Master of Classic","registered_at":"2026-06-20T15:23:29Z","symbol":"NIM1643711","token_address":"0x3c1d3c302d2ec016fa9e2b3d091e044fb4a2a8cd","type":"artist","uuid":"b7e89f6d-cc89-4bdd-81a8-a13344e166ed"}
album: Prelude Op.28 No.14 in E Flat Minor
  type: MusicAlbum
  date published: 2019-05-09
album: Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement
  type: MusicAlbum
  date published: 2019-05-17
  track: Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement
    type: MusicRecording
    duration: PT4M43S
    duration ms: 283440
    explicit: false
    by artist: Master of Classic
    in album: Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement
      type: MusicAlbum
      date published: 2019-05-17
    isrc code: QZ5FN1971330
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T22:12:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdbb378798ed82bb6117c7aec022bb5bae6b8dda06c6e297716cfe299cfaab67c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957766
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957766
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN1971330
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T22:25:04Z
    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 0xdbb378798ed82bb6117c7aec022bb5bae6b8dda06c6e297716cfe299cfaab67c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZ5FN1971330.
      date published: 2026-07-12T22:25:04Z
    audio: Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.391
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.42
      additional property: Energy
        type: PropertyValue
        value: 0.028
      additional property: Speechiness
        type: PropertyValue
        value: 0.058
      additional property: Acousticness
        type: PropertyValue
        value: 0.993
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.949
      additional property: Liveness
        type: PropertyValue
        value: 0.108
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.128
      additional property: Loudness (dB)
        type: PropertyValue
        value: -28.254
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: March in D Major, BWV Anh. 122
  type: MusicAlbum
  date published: 2019-05-18
album: Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement
  type: MusicAlbum
  date published: 2019-05-24
album: Bach Sinfonia No.12 in A Major BWV 798
  type: MusicAlbum
  date published: 2019-06-10
album: Electro Classic
  type: MusicAlbum
  date published: 2019-06-18