Private blockchains have had a relatively strong record so far. They have already transformed several sectors: supply chains, clearinghouses, and royalty payments, to name a few. And all kinds of companies can now build private blockchain apps now that Microsoft’s Azure,[945] Amazon Web Services,[946] Oracle,[947] Google Cloud, IBM,[948] and other cloud computing services now offer cloud blockchain solutions. Meanwhile, public blockchains’ only major success story has been with cryptocurrencies, and even those are facing increasing scrutiny and regulation as they grow. Projects to build
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