{"id": 4188, "prediction_verbatim": "Brent crude volatility (30-day realized) exceeds 25% within 48h", "created_at": "2026-04-30 00:09:12", "direction": null, "timeframe": "48h", "score": null, "outcome": "Auto-expired \u2014 excluded from accuracy metrics", "resolved_at": "2026-05-02 00:15:54", "chain_hash": "0df316de53f483b63db42131fb641ab8d5d1cf6163aba816312db93df0599ad6", "chain_tx": "2DCbrUBY8U2NmMXyGLwxpa2aNGzrZwRVMFXchE4xy4BnADgBM1abUdcoYHs9361sQdKroUPrttsrokbKS9HPeQmg", "verify": "sha256(f'{prediction_verbatim}|{created_at}|{id}') must equal chain_hash, and the Solana tx memo must read 'workshop:pred:<id>:<chain_hash>' with a timestamp BEFORE resolved_at. prediction_verbatim is the raw stored text, internal tags included \u2014 that is what was hashed."}