Complex sentence: The filming of the following performances was halted by the Kirovsky brothers, owners of Magenta Records, who sent a cease and desist order to the channel, claiming that Magenta owned Bueno's personality rights.
Split into simpler sentences: The filming of subsequent performances was halted by the Kirovsky brothers, owners of Magenta Records. The brothers sent a cease and desist order to the channel, claiming that Magenta owned Bueno's personality rights.