Herbert Alsen
type: MusicGroup
genre: opera
description: Herbert Alsen (sometimes Ahlsen) (12 October 1906 – 25 October 1978) was a German operatic bass of formidable volume and stature.Kurt Moses, American Record Guide, Sept./Oct., 2004 quoted on Norbeck,
popularity: 2
followers: 465
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x65c701c2776b875682e82a286a727eb41f320eb0cff757546bbb637fab27458b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d1b0d2b4-5c1e-497f-94d1-147b1be8d69e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d1b0d2b4-5c1e-497f-94d1-147b1be8d69e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d1b0d2b4-5c1e-497f-94d1-147b1be8d69e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x65c701c2776b875682e82a286a727eb41f320eb0cff757546bbb637fab27458b","name":"Herbert Alsen","registered_at":"2026-06-21T01:08:06Z","symbol":"NIM1771512","token_address":"0x9529953e024c5406984f59ce5316618dc2eba072","type":"artist","uuid":"d1b0d2b4-5c1e-497f-94d1-147b1be8d69e"}
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 0x65c701c2776b875682e82a286a727eb41f320eb0cff757546bbb637fab27458b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1b0d2b4-5c1e-497f-94d1-147b1be8d69e.json and https://artists.proofprofile.net/proofs/artist/d1b0d2b4-5c1e-497f-94d1-147b1be8d69e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0x65c701c2776b875682e82a286a727eb41f320eb0cff757546bbb637fab27458b","name":"Herbert Alsen","registered_at":"2026-06-21T01:08:06Z","symbol":"NIM1771512","token_address":"0x9529953e024c5406984f59ce5316618dc2eba072","type":"artist","uuid":"d1b0d2b4-5c1e-497f-94d1-147b1be8d69e"}
album: Dokumente einer Sängerkarriere - Herbert Alsen
  type: MusicAlbum
  date published: 2006-09-13