According to a blog post on its site, Coinbase has closed $25 million in Series B funding. Andreessen Horowitz led the round with participation from return backers Union Square Ventures and Ribbit Capital. Also, as a result of the financing, Andreessen Horowitz’s Chris Dixon and Union Square Ventures’ Fred Wilson will join Coinbase’s board. Based in San Francisco, Coinbase is a bitcoin startup. To read more details about the funding, visit here.