02 · Trust spine
Every line traces back.
A bid isn't just documents — it's a record of who decided what, from which source, and when. Steinlog shows its work: click any number, clause, or file and walk it back to its origin. The record is yours, the bidder's — and if a bid is ever challenged, it's the receipts you hand a tribunal.
- R-7.2 SWZ §7.2 · signature tier QES required
- BOQ 1.2 Foundations · € 4 200 human · estimator
- EVT 0242 draft · cover letter ai · grok-4.3 · b17d04…
- PKG ASiC-E · manifest sealed QTSP ✓ · receipt ✓
- ASiC-E · manifest sealed
- QTSP · qualified timestamp
- Portal receipt · ingested
Daily trust
Click any number, clause, or PDF and walk its origin — the human who set it, the source it cites, the version it supersedes.
Continuous integrity
Every change is hash-chained, content-addressed, and attributed to a human or a named AI model. The runtime can’t rewrite history without it showing.
Episodic proof
At submission the package is sealed with an eIDAS qualified timestamp and your signature — and we ingest the portal receipt back. One click yields a defense pack for a protest or an antitrust challenge.
BOQ 1.2 · Foundations · € 4 200
The package you leave with
For a protest, a KIO / VK-Bund appeal, or an antitrust challenge: who priced what, from which source, sealed and receipted.
Honest by design: the log is tamper-evident, not tamper-proof. The legally-probative claim attaches to the signed, timestamped, receipted package — the artifact you can hand a tribunal.