Related Information for Seth Sentry Seth Sentry (born Seth Marton, 1984) is an Australian hip-hop artist from Melbourne, Victoria.Sentry's first public appearances were during live performances with Melbourne hip hop/drum 'n' bass outfit D.S.O.L. in 2003. In 2005, he reached third place in the Revolver Battles competition, in addition to organizing and appearing in a weekly hip hop night at The Old Colonial venue in Fitzroy—Sentry's involvement with the Old Colonial led to an appearance on the The Fort.. read more