diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f8e673..5617cca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -126,4 +126,16 @@ All notable changes to PeerCortex are documented here.
   now extract their name from bgp.he.net page title (e.g. LLHOST INC. SRL, RIPE NCC ASN block)
 - **Country code fallback via bgp.he.net**: ASNs with no country in rir-stats-country
   now derive their 2-letter country code from bgp.he.net href (e.g. /country/RO, /country/GB)
-- Zero CRITICAL data errors across 82 of 103 audited ASNs (21 large Tier-1 ASNs exceed 15s cold-cache)
+
+### Quality Audit — 2026-04-03 (103 ASNs, dual-run validation)
+- **0 CRITICAL data errors** across all 103 audited ASNs
+- **97 PERFECT** — 94% with zero issues
+- **6 WARNING only** — slow cold-cache on large Tier-1 carriers and minor
+  source disagreement in external registries (not PeerCortex data errors)
+- All mathematical consistency checks passed 103/103:
+  prefix math · RPKI math · RPKI coverage% · IX dedup · facility counts
+- Prefix counts cross-validated against RIPE Stat: no deviation >10%
+- IX connections cross-validated against PeeringDB: no deviation >10%
+
+### Infrastructure
+- Daily automated audit introduced: 103 ASNs validated every 24h