The Bracha on On Death is Baruch Dayan Haemes.
The full Bracha is made over relatives and people that you know, whose passing causes you pain. Over other people, you say "בָּרוּךְ דַּיָּן הָאֱמֶת", "Baruch Dayan Ha'emes". (Source: Kitzur Shulchan Aruch 59:6)
