Karl Haas
type: MusicGroup
description: Karl Haas (December 6, 1913February 6, 2005) was a German-American classical music radio host, known for his sonorous speaking voice, humanistic approach to music appreciation, and popularization of c
popularity: 2
followers: 78
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0546da58790fb6a7c8595157a87cc2d4ba2e1dc96ecbcd4f6620ae1b61166b82
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0546da58790fb6a7c8595157a87cc2d4ba2e1dc96ecbcd4f6620ae1b61166b82","name":"Karl Haas","registered_at":"2026-06-20T21:13:10Z","symbol":"NIM1716136","token_address":"0xb68f0ad1e925a6b9af0606b6628e66b5a4142862","type":"artist","uuid":"c6496df8-7f0a-4f68-b391-f5373b723ac6"}
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0546da58790fb6a7c8595157a87cc2d4ba2e1dc96ecbcd4f6620ae1b61166b82. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.json and https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x0546da58790fb6a7c8595157a87cc2d4ba2e1dc96ecbcd4f6620ae1b61166b82","name":"Karl Haas","registered_at":"2026-06-20T21:13:10Z","symbol":"NIM1716136","token_address":"0xb68f0ad1e925a6b9af0606b6628e66b5a4142862","type":"artist","uuid":"c6496df8-7f0a-4f68-b391-f5373b723ac6"}
album: Bach: Concerto for 2 Harpsichords in C minor, BWV. 1060
  type: MusicAlbum
  date published: 1952