WHAT DOES COPYRIGHT MEAN?

A blockchain is really a distributed community ledger ??or on the web digital databases ??that contains a history of many of the transactions with a platform.?�러???�유�? 로그?? ?�출 ?�세??관�??�는 ?�티 ?�싱 ?�구???�???�중 ?�는 ?�중 ?�소 ?�증???�함?�여 교환???�는 ??지�??�공?��? ?�