Verify project URLs to see if Web 2.0 links are still active

I just read Twitter's plans to purge inactive accounts.
I am starting to link some existing web 2.0 publications that I already have since before using SER.
Some of these are in accounts that I no longer have the PW.
If Twitter removes them
These accounts are the "URLs" in my projects
So SER knows that the URL is dead?
Is there an automatic verification or is there a way to manually verify the URLs?
Of course, the URLs that are our own money site, we know if they are alive, but for others, they may fail.