Captain is online now and is CAN provide unsigned key-images to prove balance but refuses to and is planning on locking this thread and ban people who ask in their channels (me included) and only keep those who repeat after him
Proof of the bolded?
Proof that he can: CryptoNote
He refuses: he just simply stops answering for days
It's a partially Modified CryptoNote Protocol not fully implemented yet, since the DAG integration some parts of CryptoNote are broken and have to be reworked entirely, only critical parts that touch security are fully functional as far I know.