Alta earned USD $47.5 million in a Series A round led by Index Ventures to boost its own blockchain with compliance tools aimed at banks and large companies. The startup also features Airwallex as a previous investor and distribution channel for its platform. *** Index Ventures led the USD $47.5 million Series A round, in which GV, Blackbird Ventures, Square Peg and Capital49 participated. Alta seeks to differentiate its blockchain with privacy …