Prove calibration drift — not a screenshot.

Insurers, OEM warranty, and national MSOs need chain-of-custody evidence, not a technician checkbox. Evidence Theater reconstructs the drift event as a signed factor graph, replays SE(3) sensor motion, and exports a verifiable EVB-*.json bundle with SHA-256 match indicator.

Open live evidence theater → FLEET-204 twin → API Theater ingest

Shareable theater URL

EventEVB-20260603

TierCRITICAL

Signatureverified

sha256:b7f2a9c4e1d8063f5a2b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0

Preview hash · live theater computes and matches against API bundle

Evidence bundle contents

Factor graph layout

Pose nodes, bias factors, observation edges, and BOCPD changepoint markers — stress score and seed for reproducibility.

SE(3) replay scrubber

Transport controls with changepoint markers on the timeline. Geodesic drift readout at each scrub position.

Download + verify

One-click Download EVB JSON — client-side SHA-256 computed and compared to API content_hash.

Demo script — say to investor

Step 1 Scrub replay to changepoint — "this is when drift started, not when someone noticed." CUSUM

Step 2 Hover graph nodes — factor weights and residuals tied to FLEET-204 sensor track. Graph

Step 3 Download EVB JSON → SHA-256 turns green — "legal and insurance can verify offline." EVB