The first time I play a bard song (any, I've tried multiple combinations), the icon for Racial Inheritance shows up in the buff window.
Only tested on Wood Elf Bard - 1st play of song shows RI:Elven Wisdom. I've also had it show RI: Lumberjack's Finesse.
Stopping the song does not cause the icon to disappear. Only resolved by camping out and logging back in.