Chatzi Katz
type: MusicGroup
popularity: 3
followers: 478
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8417498bb53563214317d4b1536552d444c9a3ac821023bed2ab0f01383e2ade
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ffc4829b-7411-414e-a7f4-129ead559a84.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ffc4829b-7411-414e-a7f4-129ead559a84.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ffc4829b-7411-414e-a7f4-129ead559a84
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8417498bb53563214317d4b1536552d444c9a3ac821023bed2ab0f01383e2ade","name":"Chatzi Katz","registered_at":"2026-06-21T18:44:41Z","symbol":"NIM2004549","token_address":"0xf7f1bc9d55f5789cf61ab64c7f909f12a29fb9d3","type":"artist","uuid":"ffc4829b-7411-414e-a7f4-129ead559a84"}
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 0x8417498bb53563214317d4b1536552d444c9a3ac821023bed2ab0f01383e2ade. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffc4829b-7411-414e-a7f4-129ead559a84.json and https://artists.proofprofile.net/proofs/artist/ffc4829b-7411-414e-a7f4-129ead559a84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x8417498bb53563214317d4b1536552d444c9a3ac821023bed2ab0f01383e2ade","name":"Chatzi Katz","registered_at":"2026-06-21T18:44:41Z","symbol":"NIM2004549","token_address":"0xf7f1bc9d55f5789cf61ab64c7f909f12a29fb9d3","type":"artist","uuid":"ffc4829b-7411-414e-a7f4-129ead559a84"}
album: Rachum Vechanun
  type: MusicAlbum
  date published: 2022-09-10
  track: Rachum Vechanun
    type: MusicRecording
    duration: PT5M15S
    duration ms: 315147
    explicit: false
    by artist: Chatzi Katz
    in album: Rachum Vechanun
      type: MusicAlbum
      date published: 2022-09-10
    isrc code: QZNWW2261553
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T11:37:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x782fc9914429fae4de5f678ee8cdfb279fa10e040aab25ad1c1f27c7e5759c3e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959010
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959010
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2261553
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T14:40:04Z
    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 0x782fc9914429fae4de5f678ee8cdfb279fa10e040aab25ad1c1f27c7e5759c3e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:40:04Z), 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/QZNWW2261553.
      date published: 2026-07-21T14:40:04Z
    audio: Rachum Vechanun
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 136.099
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.553
      additional property: Energy
        type: PropertyValue
        value: 0.472
      additional property: Speechiness
        type: PropertyValue
        value: 0.025
      additional property: Acousticness
        type: PropertyValue
        value: 0.757
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.224
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.236
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.187
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Niggun Chaim Tzvi - ניגון חיים צבי
  type: MusicAlbum
  date published: 2023-05-14