1980 foundation of Edition Dagobert / Chappell Musikverlag (later Warner-Chappell Musikverlag), together with business partner Ulf Krüger. Development of a publishing catalogue with national and international songs and hits. Gold and platinum awards also in France and England. Since 1990 cooperation with MCA Music Publishing. 1994, publishing partner Ulf Krüger leaves Edition Dagobert, Django J.C. Seelenmeyer signs with industry leader Emi Music Publishing.
2006 to 2011 cooperation with AMV Talpa Musikverlag, a German-Dutch joint venture between Alster Musikverlag and Talpa Music Netherland, a division of the Jon De Mol Group Netherland.
2011 foundation of Klangspeicher Musikverlag, administrative publishing partner Sony/ATV Music Publishing Germany.
Klangspeicher Musikverlag, based in Hamburg, closely cooperates pro-active with national and international artists, song- and film composers, specialized in Synch. for cinema, television films and tv-series