Blackbird has: Played Jumper in "Sky Drops" in 2009. Played Blackbird in "Blackbird: Rugged" in 2010. Played Blackbird in "Blackbird: Static" in 2010. Played Blackbird in "Blackbird: Jus Someone" in 2010. Played Blackbird in "Cut Chemist featuring Blackbird: Outro" in 2012. Played Singer in "EVNTLIVE: Live Is Our Way of Life, Make It Yours" in 2013.
No, 'blackbird' is a common noun, a word for any blackbird. A proper noun is the name of a person, place, thing, or a title; for example: Dr. Tegan Blackbird, Manheim, PA Blackbird Street, Garden Grove, CA and Tampa, FL Blackbird Baking Company, Lakewood, OH 'Bye Bye Blackbird', song by Ray Henderson and Mort Dixon