NOT KNOWN DETAILS ABOUT COPYRIGHT

A blockchain is often a distributed community ledger ??or on the web electronic databases ??that contains a file of many of the transactions over a System.비트코인 채굴???�해 ?�익??�??�도 ?�습?�다 - ?�히 ?�기가 �??�?�한 지??��?�는 ?�히 그렇?�니?? ?�한 ?�익?�의 ?��??� 비트코인??