Marvin & Johnny
type: MusicGroup
genre: doo-wop
description: Marvin & Johnny were an American doo-wop duo that recorded in the 1950s. The duo comprised Marvin Phillips (born October 23, 1931) and Emory "Johnny" Perry (March 1, 1928 – January 6, 2011), who recor
popularity: 5
followers: 313
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additional property: CopyrightChainExplorerURL
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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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  date published: 2026-06-17T08:10:43Z
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album: Flipped Out
  type: MusicAlbum
  date published: 1992-03-15
album: Rock 'N' Roll Hits Of The 50's
  type: MusicAlbum
  date published: 2000-01-01
album: Rock 'N' Roll Hits Of The 50's
  type: MusicAlbum
  date published: 2011-06-01
album: Baby Doll
  type: MusicAlbum
  date published: 2015-02-27
album: I Wanna
  type: MusicAlbum
  date published: 2019-01-28
album: Sweet Potato
  type: MusicAlbum
  date published: 2019-01-28
album: Sometimes I Wonder
  type: MusicAlbum
  date published: 2019-01-28
album: Dear One
  type: MusicAlbum
  date published: 2019-01-28
album: Mercy Miss Percy
  type: MusicAlbum
  date published: 2019-01-28
album: It's Christmas
  type: MusicAlbum
  date published: 2021-09-17
track: Cherry Pie
  type: MusicRecording
  duration: PT2M37S
  duration ms: 157320
  explicit: false
  by artist: Marvin & Johnny
  in album: Koko-Mojo Diner, Vol. 2 - Cornbread & Cabbage Greens
    type: MusicAlbum
    date published: 2021-04-16
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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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 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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb993876e23c8b5c59384dd8916af9b165ac1b14fd9422dab7854afeafe1445d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEU472215550.
    date published: 2026-07-02T03:30:09Z
  audio: Cherry Pie
    type: AudioObject
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Energy
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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: Loudness (dB)
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    additional property: Key Name
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      value: A
    additional property: Mode Name
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