A readable path from claim to consensus
Evidra turns semantic fact specifications into canonical on-chain verdicts with evidence policy, provenance, freshness, and history attached.
The record
A Fact is a protocol record: claim identity, source policy, execution attempt, and resolution history. The public app shows canonical and latest separately because recency is not truth.
Contract truth
The Registry is canonical. PostgreSQL and the browser API are projections for search and presentation. Important Fact pages can request a direct chain read and show whether visible data is cached or chain-backed.
Integration note
Use /api/v1/facts/:factKey for a normalized read model, then re-check the frozen client when a user needs direct finalized verification.