Mathieu Ahlersmeyer
type: MusicGroup
genre: opera
description: thumb|Mathieu Ahlersmeyer (left) in the title role of Dantons Tod at the Hamburgische Staatsoper (1948) Mathieu Karl Maria Ahlersmeyer (29 June 1896 – 23 July 1979) was a German operatic baritone and
popularity: 2
followers: 354
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/11802f71-8f41-408d-948a-13c6a44116d0
additional property: OTSTimestamp
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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
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90be2dadd7da345aff2f547b8920beda2302f432b0a1f1fd60e84f9a91cb122. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11802f71-8f41-408d-948a-13c6a44116d0.json and https://artists.proofprofile.net/proofs/artist/11802f71-8f41-408d-948a-13c6a44116d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:37:25Z
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album: Singer Portrait
  type: MusicAlbum
  date published: 2000-01-01
album: Lebendige Vergangenheit - Mathieu Ahlersmeyer
  type: MusicAlbum
  date published: 2006-08-14
album: Singer Portrait
  type: MusicAlbum
  date published: 2011-11-18