Yes, however, self-custody makes it extremely difficult before the 60 days. It led to a whole bunch of questions, the answers to which made them nervous. Examples:

"Can you have bitcoin generate an annual 1040 for our records?"

"Can you take a screenshot of bitcoin to show us that you are the registered owner of the account?"

If these were stock sales, these requests for info are easily answered.

My advice? Wait the 60 days, and regardless of that, don't mention "bitcoin" until they start asking for details. If you don't wait the 60 days, get ready to dox the most straight-forward view of your wallet, which will be the balance and transaction history. Because they will go cross-eyed when you start talking about blockchain explorers.