Tangentially related, but how does one protect themselves against the bank account/brokerage being hacked? Can you print out a proof of funds/securities owned to take to court to be made whole?

Aside from FDIC’s insurance, nothing.

And if banks get hacked and money gets wired out - maybe we’ll come up with ways to roll back the damage.

Who knows - this is new territory.

Your screenshot/PDF is kind of worthless since it's trivially editable. Still a good idea to have it.

Banks are required by law to be able to produce account balances in a few days. In some countries the are required to submit them to account protection institution regularly so that if a bank fails they can quickly reimburse people to prevent panic spreading to other banks.

You can probably request some sort of notarized proof of accounts, but it will probably cost you $100.