Income is not part of your credit report, so there is no way to "verify" such information against what the credit bureau provides. If you have provided your employer to a bureau it might have become part of your supplemental file but not income.

I have done numerous apps in the past while unemployed and never had a problem giving "household" income which included all funds I might have access to in an emergency. Never faced a verification with AMEX, Cap1, Chase, Citi, or BoA/MBNA.