Franz Klarwein
type: MusicGroup
genre: opera
description: Franz Klarwein (8 March 1914 – 16 December 1991) was a German operatic lyric tenor and later character tenor. He was a member of the Bavarian State Opera from 1942 to 1977 and also appeared at interna
popularity: 8
followers: 266
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1b630d6517d3e97b2b13f0b2a3ea08645b4ae703d048c89de3e6a2c0c3993d23
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/711422f8-644c-4ac3-8e9e-356d31573b88.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/711422f8-644c-4ac3-8e9e-356d31573b88.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/711422f8-644c-4ac3-8e9e-356d31573b88
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1b630d6517d3e97b2b13f0b2a3ea08645b4ae703d048c89de3e6a2c0c3993d23","name":"Franz Klarwein","registered_at":"2026-06-17T05:05:38Z","symbol":"NIM1290008","token_address":"0xa28a137dfd19b1dd0e191d1c4a8255db1f32ef06","type":"artist","uuid":"711422f8-644c-4ac3-8e9e-356d31573b88"}
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 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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b630d6517d3e97b2b13f0b2a3ea08645b4ae703d048c89de3e6a2c0c3993d23. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/711422f8-644c-4ac3-8e9e-356d31573b88.json and https://artists.proofprofile.net/proofs/artist/711422f8-644c-4ac3-8e9e-356d31573b88.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x1b630d6517d3e97b2b13f0b2a3ea08645b4ae703d048c89de3e6a2c0c3993d23","name":"Franz Klarwein","registered_at":"2026-06-17T05:05:38Z","symbol":"NIM1290008","token_address":"0xa28a137dfd19b1dd0e191d1c4a8255db1f32ef06","type":"artist","uuid":"711422f8-644c-4ac3-8e9e-356d31573b88"}
album: Palestrina - Julius Patzak
  type: MusicAlbum
  date published: 2022-09-02