TORONTO – Bell Canada announced late Wednesday it has purchased a majority interest in Canadian-owned music download service Puretracks "By investing in Puretracks, Bell is better positioned to capitalize on the growing demand for online digital entertainment among Canadian consumers," said Charlotte Burke, senior vice-president, Bell Canada consumer Internet services, in a release. The financial size of the investment in Puretracks, which is part-owned by Standard Broadcasting and boasts a million song titles in its library, was not released. "With over two million Sympatico customers and more than 17 million unique visitors to Sympatico.MSN.ca every month Bell leads the way...