Dave Appell
type: MusicGroup
genre: smooth jazz
description: David Appell (March 24, 1922 – November 18, 2014) was an American musician, arranger and record producer born in Philadelphia. Career Appell (pronounced "AP-el") is associated mainly with the Cameo-P
popularity: 4
followers: 64
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-20T08:57:02Z
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album: Dave Appell & The Applejacks 1954-1962
  type: MusicAlbum
  date published: 2022-02-25
  track: Ooh, Baby, Ooh
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    duration: PT2M45S
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    explicit: false
    by artist: Dave Appell
    in album: Dave Appell & The Applejacks 1954-1962
      type: MusicAlbum
      date published: 2022-02-25
    genre: smooth jazz
    isrc code: DEU472200760
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      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
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      date published: 2026-07-20T21:33:19Z
    audio: Ooh, Baby, Ooh
      type: AudioObject
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      additional property: Loudness (dB)
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      additional property: Key Name
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