Czechmate
type: MusicGroup
description: REDIRECT CzechMate: In Search of Jiří Menzel
popularity: 4
followers: 795
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb15d7fd1c4c69a98fdf841541bddce0def1e5732f8fdc13838908c0488ce4c75
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d43209e-db5e-4b77-962a-42653b45b07d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d43209e-db5e-4b77-962a-42653b45b07d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7d43209e-db5e-4b77-962a-42653b45b07d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
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 0xb15d7fd1c4c69a98fdf841541bddce0def1e5732f8fdc13838908c0488ce4c75. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d43209e-db5e-4b77-962a-42653b45b07d.json and https://artists.proofprofile.net/proofs/artist/7d43209e-db5e-4b77-962a-42653b45b07d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
album: Boomerang
  type: MusicAlbum
  date published: 2017-04-12
album: Revival
  type: MusicAlbum
  date published: 2018-03-19
album: Cashmere Goat
  type: MusicAlbum
  date published: 2018-03-25
album: Talk Shit (feat. Kassette)
  type: MusicAlbum
  date published: 2019-01-18
album: Talk Shit
  type: MusicAlbum
  date published: 2019-01-18
album: Senseless
  type: MusicAlbum
  date published: 2019-10-18
album: Senseless
  type: MusicAlbum
  date published: 2019-10-18
album: Senseless, Vol. 2
  type: MusicAlbum
  date published: 2019-11-29
album: Senseless, Vol. 2
  type: MusicAlbum
  date published: 2019-11-29
album: Hostile
  type: MusicAlbum
  date published: 2020-03-23
album: Virus
  type: MusicAlbum
  date published: 2020-05-08
album: Virus
  type: MusicAlbum
  date published: 2020-05-08
album: Sweat
  type: MusicAlbum
  date published: 2020-07-24
album: Flavor
  type: MusicAlbum
  date published: 2020-12-18
album: Deadlines
  type: MusicAlbum
  date published: 2021-02-05
album: Hold On
  type: MusicAlbum
  date published: 2021-12-28
album: Plastik
  type: MusicAlbum
  date published: 2022-05-06
album: WERK
  type: MusicAlbum
  date published: 2023-01-13
album: Brain Bass
  type: MusicAlbum
  date published: 2023-12-08
album: Change The Past
  type: MusicAlbum
  date published: 2024-11-01
  track: Change The Past
    type: MusicRecording
    duration: PT3M10S
    duration ms: 190476
    explicit: false
    by artist: Czechmate
    in album: Change The Past
      type: MusicAlbum
      date published: 2024-11-01
    isrc code: QZWFP2444658
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T08:17:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc40eb2eb18d9c0fcb980257db69e95cab0a2fa74eb7fd1e3f2b6740573ee3f90
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958523
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958523
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2444658
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T08:54:12Z
    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 0xc40eb2eb18d9c0fcb980257db69e95cab0a2fa74eb7fd1e3f2b6740573ee3f90. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZWFP2444658.
      date published: 2026-07-18T08:54:12Z
    audio: Change The Past
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.017
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.774
      additional property: Energy
        type: PropertyValue
        value: 0.983
      additional property: Speechiness
        type: PropertyValue
        value: 0.055
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.93
      additional property: Liveness
        type: PropertyValue
        value: 0.283
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.7
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.243
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major