Last summer, Jay-Z and Beyoncé were spotted on a yacht in the Hamptons with Jack Dorsey, the CEO of Twitter. Perhaps they were talking business. Last month Dorsey and Jay-Z announced they had partnered on a new Bitcoin endowment designed to develop the currency in India and Africa. And today Dorsey announced that Square, his financial services company, has acquired a majority share of Tidal from Jay-Z for $297 million.