Michael Howard
type: MusicGroup
genre: choral
genre: gregorian chant
description: Michael Howard, Baron Howard of Lympne (born Michael Hecht; 7 July 1941) is a British politician who was Leader of the Conservative Party and Leader of the Opposition from November 2003 to December 2
popularity: 2
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/954623
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/cc2b44d7-d163-49a9-8cf5-9428f0a23cdb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cc2b44d7-d163-49a9-8cf5-9428f0a23cdb.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-20T23:40:06Z
additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa016e5d4cda394500c10560d55081dfff759dcbdf42ac28d85680d2b7a4452e0. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc2b44d7-d163-49a9-8cf5-9428f0a23cdb.json and https://artists.proofprofile.net/proofs/artist/cc2b44d7-d163-49a9-8cf5-9428f0a23cdb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:40:06Z
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album: Michael Howard: A Choral Pioneer. Historic Recordings from Ely and Arundel Cathedrals.
  type: MusicAlbum
  date published: 2008