Bitcoin inscriptions are a special kind of metadata. Bitcoin inscription is a special kind of metadata, which is an integral part of bitcoin transaction and is used to verify the source and use of bitcoin. Bitcoin inscription can be regarded as a digital signature, which contains some information of the sender and a specific algorithm code to identify the sender and the ownership of its bitcoin. Bitcoin inscriptions can also indicate the specific content of the transaction and the identity of the sender, thus enhancing the traceability of the transaction. Bitcoin is an electronic currency and digital currency produced by open source P2P software, and it is a virtual asset of the network. Bitcoin is a cryptocurrency and a distributed digital currency. Bitcoin is completely decentralized, which means that Bitcoin is not controlled by any government or financial institution and can be traded anonymously on the Internet.