Mad World
type: MusicGroup
description: "Mad World" is a 1982 song by the English new wave band Tears for Fears. Written by Roland Orzabal and sung by bassist Curt Smith, it was the band's third single release and first chart hit, reaching
popularity: 4
followers: 4733
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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: 2026-06-17T08:10:43Z
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album: Mad World
  type: MusicAlbum
  date published: 2004-08-14
album: Mad World
  type: MusicAlbum
  date published: 2011-01-14
  track: Mad World (as Made Famous by the Motion Picture Donnie Darko)
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      date published: 2011-01-14
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-04T10:04:33Z
    audio: Mad World (as Made Famous by the Motion Picture Donnie Darko)
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album: Mad World
  type: MusicAlbum
  date published: 2011-02-07
album: Real World
  type: MusicAlbum
  date published: 2015-06-06
track: Night Bird

Night Bird
type: MusicRecording
duration: PT3M25S
duration ms: 205906
explicit: false
by artist: Mad World
in album: Clouds - Cloudy Days
  type: MusicAlbum
  date published: 2013-12-10
popularity: 1
isrc code: DELM41306165
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:39:04Z
audio: Night Bird
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