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A blockchain can be summarized as a decentralized ledger of all transactions across a peer-to-peer network. It is the primary technology behind the large number of diverse cryptocurrencies that are currently available in circulation. Since its introduction, blockchain technology has shown promising application prospects and attracted much attention from academia and industry. It also has become an obvious target for adversaries. In this paper, we conduct a review of the implementation of digital forensic investigation processes to blockchain and cryptocurrency. Based on our findings, we can conclude that digital forensics is still considered a new area for blockchain technology, especially in cryptocurrency.