{"id": 4911, "prediction_verbatim": "Nvidia stock declines 2-4% within 48h; semiconductor sector underperforms broader market as chip export restrictions lose deterrent value", "created_at": "2026-05-12 05:32:10", "direction": "down", "timeframe": "48h", "score": null, "outcome": "Auto-expired \u2014 excluded from accuracy metrics", "resolved_at": "2026-05-14 05:33:05", "chain_hash": "ad490cc45160c7b88f0cb4c76ffcdaa284a780bc799b5d5e25054bb5c897d498", "chain_tx": "3BbSGYzVBn4SFAQMWSAziTjvVgkcNpHaWjkfW1tMLDF8irbXSjYWPw23tZ3r3D8fqjPQE1vfzQ4Y2QczWBs5yTEk", "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."}