I'm pretty nervous that neither Wayback Machine nor archive-dot-today appear to be able to snapshot Bluesky posts. Between this and paywalls, I'm not aware of an alternative user-accessible check against edited / deleted posts.

Might as well be a Telegram/Discord channel, or a Futaba Channel site. At least vBulletin could be archived.

Looks like there's a page on https://wiki.archiveteam.org/index.php/Bluesky for it though.