how to get password for dark web email compromise

My email and an associated password were compromised on the dark web. I use that email for many sites, and the alert did not specify the site. Is there a way I can get the compromised password so I can figure out which site was compromised? Is there any service that will send the password to the associated email or send a verification link to the email to show the password? Any laws pertain to my obtaining the data to find out for myself?