CONFERENCE METADATA — incomplete historical coverage; source presence is not proof of delivery.
Research dataset: Lukas Walter, Clemens Sauerwein, Daniel Woods, InfoSec.pptx, https://doi.org/10.5281/zenodo.15989593, CC BY 4.0 https://creativecommons.org/licenses/by/4.0/. Changes: metadata extraction, exact-match reconciliation and uncertainty flags. No endorsement implied.

{
  "id": "ccc-8d964e8f-4853-5ca9-8a0e-6afc215dae7d",
  "title": "Von Groschen und SpurLos - GNU Taler auch auf eurem Event!",
  "presenters": [
    "Mikolai Gütschow",
    "signum"
  ],
  "event": "39C3: Power Cycles",
  "year": "2025",
  "source_url": "https://media.ccc.de/v/39c3-von-groschen-und-spurlos-gnu-taler-auch-auf-eurem-event",
  "source_kind": "CCC recording catalog",
  "source_file": "ccc-39c3.json",
  "rights": "Metadata and source links only; abstracts, biographies, transcripts and media not republished",
  "delivery_status": "Not independently verified",
  "title_status": "source supplied",
  "presenter_status": "source supplied",
  "media": [
    {
      "kind": "recording page",
      "url": "https://media.ccc.de/v/39c3-von-groschen-und-spurlos-gnu-taler-auch-auf-eurem-event"
    }
  ],
  "provenance": [
    {
      "event": "39c3",
      "title": "39C3: Power Cycles",
      "source": "https://api.media.ccc.de/public/conferences/39c3",
      "file": "ccc-39c3.json",
      "sha256": "47e280d801be1c275eb64976eeb83ea102a84ba0a0d43bc15857db42259997d9",
      "checked": "2026-10-16T03:42:54Z",
      "source_records": 180
    }
  ],
  "source_guid": "8d964e8f-4853-5ca9-8a0e-6afc215dae7d",
  "source_event_api": "https://api.media.ccc.de/public/events/8d964e8f-4853-5ca9-8a0e-6afc215dae7d",
  "date": "2025-12-30T13:50:00.000+01:00",
  "duration_seconds": 2444,
  "language": "deu",
  "tags": [
    "1527",
    "2025",
    "39c3",
    "CCC & Community",
    "Ground",
    "39c3-deu",
    "39c3-eng",
    "39c3-por",
    "Day 4"
  ],
  "event_acronym": "39c3",
  "source_schedule_url": ""
}