Oct 19 (Reuters) - Canada’s main stock index hit a record high on Tuesday, helped by mining stocks, while the prospect of strong corporate earnings further lifted investor sentiment. At 9:33 a.m. ET (13:33 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 63.41 points, or 0.3%, at 21,048.78. (Reporting by Amal S in Bengaluru)