Unit 4 + 2
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description: Unit 4 + 2 were a British pop band formed in Hertfordshire, England, who had a number one hit on the UK Singles Chart in 1965 with the song "Concrete and Clay". The track topped the UK chart for one w
popularity: 25
followers: 2946
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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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album: Concrete And Clay
  type: MusicAlbum
  date published: 1964
album: Best of Unit 4 + 2, Deluxe Edition
  type: MusicAlbum
  date published: 1964-01-01
album: Best of Unit Four Plus Two, Deluxe Edition
  type: MusicAlbum
  date published: 1964-01-01
album: Best of Unit 4 + 2, Vol. 1.
  type: MusicAlbum
  date published: 1964-03-01
album: Best of Unit 4 + 2, Vol. 2.
  type: MusicAlbum
  date published: 1964-03-01
album: Concrete and Clay
  type: MusicAlbum
  date published: 1965-03-01
album: Best of Unit Four Plus Two, Vol. 1.
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  date published: 1965-03-01
album: Concrete and Clay
  type: MusicAlbum
  date published: 1965-03-01
album: Concrete And Clay/You've Never Been In Love Like This Before
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  date published: 2008-08-28
album: Unit 4 + 2 , Greatest Hits
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  date published: 2011-09-29
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      date published: 2026-07-03T19:59:51Z
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album: Unit 4 + 2 , Greatest Hits
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album: Concrete and Clay - Single
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  date published: 2013
album: Concrete and Clay / (You've) Never Been in Love Like This Before - Single
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  date published: 2013
  track: (You've) Never Been in Love Like This Before
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-17T19:12:23Z
    audio: (You've) Never Been in Love Like This Before
album: Best of Unit 4 + 2, Vol. 3
album: Best of Unit Four Plus Two, Vol. 2
album: Best of Unit Four Plus Two, Vol. 1
album: Concrete and Clay: The Lost Broadcasts
track: Concrete And Clay

(You've) Never Been in Love Like This Before
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Best of Unit 4 + 2, Vol. 3
type: MusicAlbum
date published: 2014-04-04

Best of Unit Four Plus Two, Vol. 2
type: MusicAlbum
date published: 2015-06-04

Best of Unit Four Plus Two, Vol. 1
type: MusicAlbum
date published: 2015-06-06

Concrete and Clay: The Lost Broadcasts
type: MusicAlbum
date published: 2018-08-31

Concrete And Clay
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by artist: Unit 4 + 2
in album: Greatest 60's Hits Best Ever
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isrc code: NLB120600153
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:53:27Z
audio: Concrete And Clay
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