Question about title insurance and Chain of Title

[TJ Nowitzki]

Hi all,

My question is if the current owner received a grant deed that was issued title insurance in 2010. Does that mean you would only need to track chain of title back to the last grant deed that was issued title insurance? Or do you need to track title back to when the property was built to be sure that there are no senior liens? (This is related to properties in California)

This is related to buying properties at foreclosure auctions.

Thanks