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way back to the original genesis block. 67 The Blockchain Game Alliance was formed in September 2018 to explore alternative uses of blockchains in video bitcoin mining difficulty explained gaming with support of Ubisoft and Fig, among others. 08 Blockchains use various time-stamping schemes, such as proof-of-work, to serialize changes.

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Archived from the original on Retrieved b Voorhees, Erik. Archived from the original on 7 November 2016. Data quality is maintained by massive database replication 8 and computational trust. A transaction must occur. One of the most common examples employed by Bitcoin is called proof of work. Retrieved 16 November 2016. They could send a transaction and then reverse it, making it appear as though they still had the coin they just spent.