Equation
type: MusicGroup
genre: acid house
genre: chicago house
description: thumb|right|300px|The first use of an equals sign, equivalent to 14x + 15 = 71 in modern notation. From The Whetstone of Witte by Robert Recorde of Wales (1557).Recorde, Robert, The Whetstone of Witte
popularity: 12
followers: 438
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f30fd677ef7be3e677373afdeacf8c7c3bcfeb702d076633fb1f47fb6876f1. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec6e8389-9bfc-4414-a5a0-7a03a0023253.json and https://artists.proofprofile.net/proofs/artist/ec6e8389-9bfc-4414-a5a0-7a03a0023253.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
album: The Answer
  type: MusicAlbum
  date published: 1989-06-02
album: The Answer
  type: MusicAlbum
  date published: 1989-06-02
  track: The Answer - Frankie Bones Long Division Mix
    type: MusicRecording
    duration: PT5M39S
    duration ms: 339522
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    by artist: Equation
    in album: The Answer
      type: MusicAlbum
      date published: 1989-06-02
    genre: acid house
    genre: chicago house
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-18T12:14:37Z
    audio: The Answer - Frankie Bones Long Division Mix
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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album: The Theory Of Housativity
  type: MusicAlbum
  date published: 1991-08-02