Here is the official statement:
Heart & Soul artist management is very sad to announce Otis Clay passed away unexpectedly of a heart attack in the early evening of January 8, 2016. Please keep the Clay family in your prayers.
Remembering Otis Clay, A Blues Hall Of Fame Musician
NPR, Fresh Air with Terry Gross
Otis Clay, Soul Singer and Blues Hall of Fame Inductee, Dead at 73
Rolling Stone
Washington Post: Otis Clay, rhythm and blues singer with unvarnished style, dies at 73
Otis Clay (February 11, 1942 – January 8, 2016) was an American R&B and soul singer, who started in gospel music. In 2013, Clay was inducted to the Blues Hall of Fame.
