How do you actually find out if a local business has permanently closed — not just shows up as closed online?

There's a specific kind of frustration that happens when a local business shows as "temporarily closed" or has outdated hours on every platform, but you can't tell if it's actually gone for good. Google might say "temporarily closed" for months on a place that has clearly shut down. Yelp shows old reviews and a phone that rings out. The business website is still live but hasn't posted in two years. The Facebook page has a cover photo from 2021. I'm curious what actual steps people take to verify whether a local business is still open — beyond checking the usual suspects. Have you found any reliable methods that cut through stale data? Things like checking local Facebook groups, calling during posted hours, driving by, checking county business license databases — or anything else that actually works? Also: do you think this is a solvable problem at the directory level? Or is it just inherently hard to keep up with closures?