Sentinel
Six signals, one verdict, and the working shown.
A claim is weighed across six independent signals. No single signal can make it verified, and a check that could not run is reported as not run, never counted for or against.
- Six independent signals
- Verified, or flagged
- Events, never individuals
The signals
What weighs a claim.
Cross-source corroboration
How much coverage from outlets graded credible carries the claim. Thin coverage is reported as thin; a search that could not run is reported as unavailable, never as evidence against.
The fact-check record
Published fact-checks of the claim. A fact-check never lifts a claim toward verified, and a published false rating is the one input that decides a verdict on its own.
Spread velocity
How fast the narrative is spreading. A story accelerating before anyone has verified it counts against the claim.
Prior-narrative correlation
Whether the claim matches a narrative already flagged, including one pushed across several channels at once.
Known manipulation patterns
Known manipulation patterns and their historical precedent. A match counts against the claim.
Models weigh, humans verify
A model’s own read of the text for manipulation. It is one signal of six: on its own it cannot make a claim verified.
The human step
A person decides what reaches the feed.
Verify
An analyst can verify a claim only with a confidence score attached.
Dismiss
Dismissing a claim takes a written reason.
Every decision is recorded with the analyst’s name and written to the audit log. The customer feed carries only claims a person verified; a request for anything else is refused, not quietly narrowed.
Physical observations
Measurements are kept apart from claims.
- Seismic events from USGS, disaster alerts from GDACS and airspace density from OpenSky need no key.
- Satellite fire detections come from NASA FIRMS. The feed runs once its access key is set; until then the page shows it as off, never as live.
- Airspace is stored as aircraft counts per cell, never an aircraft’s identity.
- An observation never enters the claim queue and is never given a claim verdict.
The ethic
Events and risks — never individuals.
Author names and handles are dropped before a scan is stored, and airspace is kept as counts, never identities.
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