If the bank can give responsibility for Bitcoin transactions then that is truly extraordinary and maybe the bank in my opinion is more inclined towards the spectacular.
The bank usually will not give something that is not its right, for example, for very large transactions at a bank with a different bank, it requires a lot of very confidential documents.
Moreover, this is for Bitcoin transactions, I think the Bank will be hands off for the Bitcoin issue because it is not a specialist for the Bank.