Blockchain could soon power stock markets, music sales, and health records — here's how it works

Wall Street's biggest institutions are obsessed with blockchain, the technology that powers bitcoin. Blockchain essentially unifies records simultaneously, speeding things up and also ensuring that everyone has the same information at the same time.  Australia's stock exchange operator is working on a trade settlement system using the technology and should decide by the end of 2017 if it will be implemented. Blockchain's champions say the technology could be used to tackle everything from...