Mark Hummel
type: MusicGroup
genre: blues
description: Mark Hummel (born December 15, 1955) is an American blues harmonica player, vocalist, songwriter, and long-time bandleader of the Blues Survivors. Since 1991, Hummel has produced the Blues Harmonica B
popularity: 18
followers: 4688
additional property: CopyrightID
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerifyInstructions
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  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 0x904954aa9d49c690952d58ac15dc8b89cdacbc17cee48dc976def354a27d57eb. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/142bdd66-a0ef-4d1d-bbfc-4a6418b412b7.json and https://artists.proofprofile.net/proofs/artist/142bdd66-a0ef-4d1d-bbfc-4a6418b412b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T07:58:09Z
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album: Feel Like Rockin'
  type: MusicAlbum
  date published: 1994-01-01
album: Feel Like Rockin'
  type: MusicAlbum
  date published: 1994-06-14
album: Married to the Blues
  type: MusicAlbum
  date published: 1995-01-01
album: Married To The Blues
  type: MusicAlbum
  date published: 1995-08-01
album: Golden State Blues
  type: MusicAlbum
  date published: 2003
album: Blowin' My Horn
  type: MusicAlbum
  date published: 2004
album: Harmonica Party - Vintage Mark Hummel
  type: MusicAlbum
  date published: 2006-08-29
album: Harmonica Party - Vintage Mark Hummel
  type: MusicAlbum
  date published: 2006-08-29
album: Ain't Easy No More
  type: MusicAlbum
  date published: 2006-10-03
  track: Creeper Returns
    type: MusicRecording
    duration: PT4M39S
    duration ms: 279733
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    by artist: Mark Hummel
    in album: Ain't Easy No More
      type: MusicAlbum
      date published: 2006-10-03
    genre: blues
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
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      value: 2026-07-02T16:51:38Z
    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
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      date published: 2026-07-02T16:51:38Z
    audio: Creeper Returns
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 176.266
      additional property: Musical Key
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        value: 6
      additional property: Mode (Major/Minor)
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        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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        value: 0.424
      additional property: Energy
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        value: 0.833
      additional property: Speechiness
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        value: 0.053
      additional property: Acousticness
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        value: 0.033
      additional property: Instrumentalness
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        value: 0.532
      additional property: Liveness
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        value: 0.081
      additional property: Valence (Positivity)
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        value: 0.789
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.99
      additional property: Key Name
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        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Mark Hummel's Blues Harmonica Blowouts
  type: MusicAlbum
  date published: 2008-10-23
album: Retro-Active
  type: MusicAlbum
  date published: 2010-04-20
album: The Hustle Is Really On
  type: MusicAlbum
  date published: 2014-04-15
album: Harpbreaker
  type: MusicAlbum
  date published: 2018-09-21
album: Wayback Machine
  type: MusicAlbum
  date published: 2020-01-17
album: True Believer
  type: MusicAlbum
  date published: 2024-06-20