Bruce Katz
type: MusicGroup
genre: blues
genre: classic blues
genre: modern blues
description: Bruce Katz (born August 19, 1952) is an American musician, playing piano, organ and bass guitar. From 1996 to 2010, he was on the faculty at the Berklee College of Music in Boston as an associate prof
popularity: 10
followers: 857
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/954066
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  value: https://artists.proofprofile.net/proofs/artist/76bb323e-b33b-4ea2-813f-f471873c3dd9.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c4217c442cadbfbc8ae86ef8ce48ef4ad150a5ebdd612a918558d974d5fd3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76bb323e-b33b-4ea2-813f-f471873c3dd9.json and https://artists.proofprofile.net/proofs/artist/76bb323e-b33b-4ea2-813f-f471873c3dd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x330c4217c442cadbfbc8ae86ef8ce48ef4ad150a5ebdd612a918558d974d5fd3","name":"Bruce Katz","registered_at":"2026-06-17T07:04:42Z","symbol":"NIM1318418","token_address":"0x020eb72004a5ed84874deaedb3d6888d83a04902","type":"artist","uuid":"76bb323e-b33b-4ea2-813f-f471873c3dd9"}
album: Live! At The Firefly
  type: MusicAlbum
  date published: 2008-09-30
album: Mean Old Train
  type: MusicAlbum
  date published: 2018-08-31
album: Journeys to the Heart of the Blues
  type: MusicAlbum
  date published: 2018-10-26
  track: Mean Old Train
    type: MusicRecording
    duration: PT3M3S
    duration ms: 183866
    explicit: false
    by artist: Bruce Katz
    in album: Journeys to the Heart of the Blues
      type: MusicAlbum
      date published: 2018-10-26
    genre: blues
    genre: classic blues
    genre: modern blues
    isrc code: NLC241800028
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC241800028
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T08:56:35Z
    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 0xc2171bd63bb005f25deaf060ea5a53ba73d697bcb4b76a5cdd76eb0ead17c35e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLC241800028.
      date published: 2026-07-03T08:56:35Z
    audio: Mean Old Train
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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        value: 0.653
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.546
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor