Sigmund Jähn
type: MusicGroup
description: Sigmund Werner Paul Jähn (; 13 February 1937 – 21 September 2019) was a German pilot, cosmonaut, and Generalmajor (equivalent to a Brigadier General in Western armies) in the National People's Army of
popularity: 9
followers: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xce8cf16e2f55c71cfc9ddea5d97428c1d01961fc52475df5caa53bc72cf992b9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4be5f792-787c-4681-ae58-431754beb491.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4be5f792-787c-4681-ae58-431754beb491.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4be5f792-787c-4681-ae58-431754beb491
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xce8cf16e2f55c71cfc9ddea5d97428c1d01961fc52475df5caa53bc72cf992b9","name":"Sigmund Jähn","registered_at":"2026-06-16T16:00:21Z","symbol":"NIM1102627","token_address":"0x59c5bae659ec198b97c18193f832a417a2df9bed","type":"artist","uuid":"4be5f792-787c-4681-ae58-431754beb491"}
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 0xce8cf16e2f55c71cfc9ddea5d97428c1d01961fc52475df5caa53bc72cf992b9. 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/4be5f792-787c-4681-ae58-431754beb491.json and https://artists.proofprofile.net/proofs/artist/4be5f792-787c-4681-ae58-431754beb491.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xce8cf16e2f55c71cfc9ddea5d97428c1d01961fc52475df5caa53bc72cf992b9","name":"Sigmund Jähn","registered_at":"2026-06-16T16:00:21Z","symbol":"NIM1102627","token_address":"0x59c5bae659ec198b97c18193f832a417a2df9bed","type":"artist","uuid":"4be5f792-787c-4681-ae58-431754beb491"}