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Diamonds. Bitcoin. Pork. If you think you've spotted the odd one out, think again: All three are things you can track using blockchain technologies today.
Blockchains are distributed, tamper-proof, public ledgers of transactions, brought to public attention by the cryptocurrency bitcoin, which is based on what is still the most widespread blockchain. But blockchains are being used for a whole lot more than making pseudonymous payments outside the traditional banking system.
Because blockchains are distributed, an industry or a marketplace can use them without the risk of a single point of failure. And because they can't be modified, there is no question of whether the record keeper can be trusted. Those factors have prompted a number of enterprises to build blockchains into essential business functions, or at least to test them there.