is it possible to get a signal if someone is recording my meeting through a third party software

Hi @showeb443 

Unfortunately, that is not possible. 

If you are worried about the contents of your meeting being recorded and improperly shared, I'd recommend using the watermark feature, which adds a faint watermark of their email address on their view of the meeting. This way, if they do record and share, you know exactly who recorded your session and leaked that info. 

Hope that helps and please make sure to mark the solution as accepted if this information is what you needed.