“Her second tongue was English, but her first was patience,” sings Elliah Heifetz on his new single, “Living Proof”—a loving ode to his mother who, along with his father and sister, came to America in 1990 as political refugees from the Soviet Union. “Everything she did, she had to do.” This story of upbringing is typical for generations of immigrant children, but Heifetz’s tale carries a unique calling card; his unabashed love for American country and roots music.