Mack David
type: MusicGroup
description: Mack David (July 5, 1912 – December 30, 1993) was an American lyricist and songwriter, notable for his work in film and television, with a career spanning the period between the early 1940s and the ea
popularity: 2
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a53247d7-367e-4ef2-ba9d-71e00e1642e8.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-20T08:57:02Z
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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 0x7fef5fb7f2048bfd67fe13bd517637e5e731b47f3dca5cf0dbe78f4f8cbcf347. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a53247d7-367e-4ef2-ba9d-71e00e1642e8.json and https://artists.proofprofile.net/proofs/artist/a53247d7-367e-4ef2-ba9d-71e00e1642e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x7fef5fb7f2048bfd67fe13bd517637e5e731b47f3dca5cf0dbe78f4f8cbcf347","name":"Mack David","registered_at":"2026-06-20T07:02:17Z","symbol":"NIM1548507","token_address":"0xddf26733ed978f13b637a577ff358ad4554a497d","type":"artist","uuid":"a53247d7-367e-4ef2-ba9d-71e00e1642e8"}
album: A dream is a wish your heart makes
  type: MusicAlbum
  date published: 2012
track: B:8 A Dream is a Wish Your Heart Makes (from Cinderella)
  type: MusicRecording
  duration: PT1M44S
  duration ms: 104133
  explicit: false
  by artist: Livingston
  by artist: Phillip Keveren
  by artist: Al Hoffman
  by artist: Mack David
  by artist: M. David
  by artist: Robert Thompson
  in album: Piano Exam Pieces 2025 & 2026, ABRSM Grade 4
    type: MusicAlbum
    date published: 2024-06-06
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEYQ2454524
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T11:07:37Z
  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 0x7d9c56a2f9d39b810ac59258fb5b1a8b40506b107d547a41c45e8c3444b8a2c0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBEYQ2454524.
    date published: 2026-07-29T11:07:37Z
  audio: B:8 A Dream is a Wish Your Heart Makes (from Cinderella)
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    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
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      value: 5
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
      value: 0.031
    additional property: Speechiness
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      value: 0.067
    additional property: Acousticness
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      value: 0.995
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.91
    additional property: Liveness
      type: PropertyValue
      value: 0.114
    additional property: Valence (Positivity)
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      value: 0.42
    additional property: Loudness (dB)
      type: PropertyValue
      value: -31.113
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major