Mr. Dorsey goes to Washington, muses about blockchain

The purpose of yesterday's congressional hearings was ostensibly for Facebook, Twitter, and (the absent) Google to discuss alleged bias in their respective services. But while Facebook's Sheryl Sandberg and Twitter's Jack Dorsey both acquitted themselves well overall, it was the latter who hit on something of interest to The Block's readers.

Twitter has been battling with trolls, bots, and how to best handle community complaints about offensive or otherwise troublesome content. Dorsey was quick to admit after the hearing, the company hasn't always been successful. "We failed our intended impartiality," he tweeted. "Our algorithms were unfairly filtering 600,000 accounts, including some members of Congress. Bias in algorithms is an important topic. Our responsibility is to understand, measure, and reduce accidental bias due to factors such as the quality of the data used to train our algorithms."

Other than making a better Twitter, it was Dorsey's earlier testimony about how they might do this that intrigues. Doris Matsui of California asked specifically whether blockchain could he