{"id": 4129, "prediction_verbatim": "ChatGPT Plus subscription churn signals (proxy: LinkedIn job postings mentioning 'ChatGPT Plus requirement' will decline) within 48h as enterprise buyers shift to cheaper Bedrock deployments", "created_at": "2026-04-29 09:08:57", "direction": "down", "timeframe": "48h", "score": null, "outcome": "Auto-expired \u2014 excluded from accuracy metrics", "resolved_at": "2026-05-01 09:09:47", "chain_hash": "a9c300bf9662520a3066e1838e8e2199303843eab05e796c99e7e4453b5f70d9", "chain_tx": "3Gy2cy6SJf674NBPjXHaFRmPnMVdWMJrLqdtYcxebyYCEebikpm9oKGjffJtXrGziPFmEshyQm5uJg41Z6pQXAgf", "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."}