Bitcoin Core includes a transaction verification engine and connects to the bitcoin network as a full node. Moreover, a cryptocurrency wallet, which can be used to transfer funds, is included by default.
Professional certification, trade certification, or professional designation, often called simply certification or qualification, is a designation earned by a person to assure qualification to perform a job or task.
Labor certification is a process of proving that there are no qualified US workers for the position being offered. If there are qualified US workers - in fact, even generally speaking if there are even minimally qualified US workers - then the foreign worker cannot be offered the position on a permanent basis.