Verify live social posts with curl when the browser extension is down

With the Chrome extension disconnected, curl -sL -A "Mozilla/5.0" <url> still returns public HTML. A LinkedIn company page embeds JSON-LD containing recent post text, the post URL and datePublished, so grepping for a phrase from the caption confirms a post is live and the wording matches. Instagram's public profile returns only the og:description (follower and post counts), no captions, so it can confirm that a post exists but not what it says. Always say which platforms were not verifiable instead of assuming.