ˌcross-ˈcheck verb [intransitive and transitive]
to make certain that something is correct by using a different method to check it again
—ˈcross-check noun [countable]

[TahlilGaran] Dictionary of Contemporary English ▲

cross check
cross-check¹ v. To test the truth of by examining in different ways or by seeing different reports about.
If you see something in a book that may not be true, be sure to crosscheck it in other books.
cross-check² n. The testing of the truth of by checking one report against another or others.
A cross-check with other books will show us if this story is true.

[TahlilGaran] English Idioms Dictionary ▲