diff --git a/services/processor/src/processors/aggregation.service.ts b/services/processor/src/processors/aggregation.service.ts
index 1613414..010c19b 100644
--- a/services/processor/src/processors/aggregation.service.ts
+++ b/services/processor/src/processors/aggregation.service.ts
@@ -54,7 +54,14 @@ export class AggregationService implements OnModuleDestroy {
   }
 
   async processEvent(event: ProcessableEvent): Promise<void> {
-    const { eventType, timestamp, userId, properties } = event;
+    const { eventType, timestamp, sessionId, userId, properties } = event;
+
+    // Synthetic canary events (quinn-analytics-canary.timer) exist to prove
+    // the tracker→edge→relay→collector→raw_events chain end-to-end. They must
+    // reach raw_events (that IS the proof) but never count toward metrics.
+    if (sessionId?.startsWith('canary-')) {
+      return;
+    }
 
     const hourBucket = this.getTimeBucket(timestamp, TimeGranularity.HOUR);
     const dayBucket = this.getTimeBucket(timestamp, TimeGranularity.DAY);