Stefan Köhler
type: MusicGroup
description: Stefan Heinz Andreas Köhler (born 24 September 1967) is a German politician of the Christian Social Union who was elected member of the European Parliament in 2024. He has served as president of the D
popularity: 20
followers: 57
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x59c0dc632864a7e160c43a9a2e5c7c20d620645900058a855f98a2db6188e604
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953657
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953657
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ae05249-3fc7-4c91-abc8-7d617daa5e53.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ae05249-3fc7-4c91-abc8-7d617daa5e53.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4ae05249-3fc7-4c91-abc8-7d617daa5e53
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:43:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x59c0dc632864a7e160c43a9a2e5c7c20d620645900058a855f98a2db6188e604","name":"Stefan Köhler","registered_at":"2026-06-14T12:20:05Z","symbol":"NIM0451019","token_address":"0x1bb32d82fa75e4d962ad57df85939a1ab47dd0cc","type":"artist","uuid":"4ae05249-3fc7-4c91-abc8-7d617daa5e53"}
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 0x59c0dc632864a7e160c43a9a2e5c7c20d620645900058a855f98a2db6188e604. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ae05249-3fc7-4c91-abc8-7d617daa5e53.json and https://artists.proofprofile.net/proofs/artist/4ae05249-3fc7-4c91-abc8-7d617daa5e53.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T16:43:25Z
  text: {"copyright_id":"0x59c0dc632864a7e160c43a9a2e5c7c20d620645900058a855f98a2db6188e604","name":"Stefan Köhler","registered_at":"2026-06-14T12:20:05Z","symbol":"NIM0451019","token_address":"0x1bb32d82fa75e4d962ad57df85939a1ab47dd0cc","type":"artist","uuid":"4ae05249-3fc7-4c91-abc8-7d617daa5e53"}
album: Auf Feindfahrt mit U 139 (Weltkriegsthriller über ein deutsches U-Boot im Einsatz)
  type: MusicAlbum
  date published: 2021-03-28
album: Einsatzbericht: Im Fadenkreuz (Spannende U-Boot Romane von EK-2 Publishing)
  type: MusicAlbum
  date published: 2023-07-11
album: Auf Feindfahrt Teil II - Wölfe der See: Zweiter Weltkrieg: Marine-Thriller über ein deutsches U-Boot im Einsatz (Auf Feindfahrt - Romanreihe über deutsche U-Boote im Einsatz, Band 2)
  type: MusicAlbum
  date published: 2023-12-22