Police say tens of thousands of people in paedophile networks viewed the pictures that Jörg L, 43, posted on the Swiss secure messaging service Threema.
A raid on his home last October in Bergisch Gladbach, near Cologne, led police to investigate dozens more alleged paedophiles.
His wife will testify against him.
Eighty-seven suspected paedophiles have been identified in all 16 German states as a result of this case, and 50 children, aged from three months to 15 years, have been removed from abusive parents.
Three investigators traumatised by the images have taken sick leave.
Court spokesperson Michaela Brunssen said Jörg L “is alleged to have committed sexual violence, sometimes severe violence, against his daughter in 61 cases”.