Open standard
Open Forecast Receipt v0.1
A machine-verifiable JSON receipt that preserves one forecast, its timing, target, forecaster, provenance, and integrity envelope without storing hidden chain-of-thought.
Last updated 28 August 2026
One forecast, one receipt
Each individual forecast is sealed independently. Publisher collections are browsing aids and never replace the identity or digest of an individual receipt.
Canonical verification
Verifiers validate the JSON Schema, canonicalize receiptPayload using RFC 8785, compute SHA-256, and compare it with proofEnvelope.payloadDigestSha256.