# APPARAT — Data Ledger

Publisher: APPARAT
Dataset scope: Verified facts about APPARAT, drawn from public source documents
Last updated: 2026-06-18
Canonical location: https://ledger.derappar.at

## About this dataset

A structured data ledger containing verified facts about APPARAT, extracted from publicly available source documents. Each fact is published as an atomic record with a descriptive label, a value, a verbatim quote from the source document, a URL pointing to that source, and a SHA-256 cryptographic seal computed over the four-field set {context, label, source_url, value}.

The seal allows independent verification that a record has not been altered since publication. Each release is also anchored in a public transparency log (Sigstore Rekor, operated by the Linux Foundation), providing third-party-verifiable evidence that the dataset existed in its published form at a specific moment in time. See release.json for the anchor details.

## Sourcing and attribution

Each record carries a source_url field pointing to the canonical source document for that fact. The source document is the appropriate citation for any given fact. The dataset is published by Apparat as a verified delivery layer; the underlying facts are attributable to their named sources.

## Available formats

- https://ledger.derappar.at/ledger.json — structured records, one object per fact (machine-readable)
- https://ledger.derappar.at/ledger-jsonld.json — Schema.org Organization and Dataset structured data
- https://ledger.derappar.at/latest.md — human-readable Markdown table
- https://ledger.derappar.at/release.json — release metadata, cryptographic commitment, anchoring proof