Karl Erb
type: MusicGroup
genre: choral
description: Karl Erb (13 July 1877 – 13 July 1958) was a German tenor who made his career first in opera and then in oratorio and lieder recital. He excelled in all these genres, and before 1920 gave classic perf
popularity: 5
followers: 131
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x48ae17df805fbccdf461364650c0fcb74876d568bd766ec1e6764ee64bb63d13
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954063
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954063
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/473abe62-d8a0-4ca3-9142-f981cb03e717.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/473abe62-d8a0-4ca3-9142-f981cb03e717.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/473abe62-d8a0-4ca3-9142-f981cb03e717
additional property: OTSTimestamp
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  value: 2026-06-17T07:49:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x48ae17df805fbccdf461364650c0fcb74876d568bd766ec1e6764ee64bb63d13","name":"Karl Erb","registered_at":"2026-06-16T14:32:53Z","symbol":"NIM1081748","token_address":"0x81054f57ab608890af5448e874260a1d33b0cb8a","type":"artist","uuid":"473abe62-d8a0-4ca3-9142-f981cb03e717"}
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 0x48ae17df805fbccdf461364650c0fcb74876d568bd766ec1e6764ee64bb63d13. 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/473abe62-d8a0-4ca3-9142-f981cb03e717.json and https://artists.proofprofile.net/proofs/artist/473abe62-d8a0-4ca3-9142-f981cb03e717.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
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album: Liederalbum
  type: MusicAlbum
  date published: 2006-08-18
album: Lebendige Vergangenheit - Karl Erb - Liederalbum (Vol. 2)
  type: MusicAlbum
  date published: 2006-08-22
album: Lebendige Vergangenheit - Karl Erb
  type: MusicAlbum
  date published: 2006-10-10
album: Singer Portrait - Karl Erb, Vol. 1
  type: MusicAlbum
  date published: 2012-01-30