You could use https://www.nirsoft.net/utils/chrome_cache_view.html to extract your browser cache, then grep the whole thing for something like `UC[A-Za-z_-]{20,30}`. That'll probably find an overwhelming amount of junk, but it might also work too. (The idea is to search the cache for UCID matches in JSON dumps.)
If this seems interesting, the immediate priority would be to backup your cache folder immediately (%AppData%\Local\Google\Chrome\User Data\Default\Cache), then extract and search it at your leisure.
(This is all for Windows, but IIUC there are alternatives for Linux and macOS.)