{"id": 4201, "prediction_verbatim": "Ethereum and top-10 altcoins outperform Bitcoin by >2% within 48h as institutional ETF capital spills into diversified crypto holdings", "created_at": "2026-04-30 03:09:30", "direction": "up", "timeframe": "48h", "score": null, "outcome": "Auto-expired \u2014 excluded from accuracy metrics", "resolved_at": "2026-05-02 03:15:49", "chain_hash": "a08285e06a679220bba60e3e6730b411f072f197724981ecf68b4d1bb443d0b7", "chain_tx": "UrCXZDxszLYHW6Rk9sP1vZx6T3TLj678VZ7GpDXq5z1icQaS3QFqpgEMxjjz1jLN46Fxs8TxkeotbBnwPgMZDmz", "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."}