Here is the full list of all 19 The Voice (DE) trophies - there are 7 bronze, 1 silver, 10 gold and 1 platinum.
You unlocked all trophies in The Voice of Germany Vol. 2.
You watched the Credits.
You watched the Jukebox.
You played a Tournament.
You achieved a High-Score in every song.
You achieved your first High-Score.
You achieved a High-Score of at least 6000.
You achieved a High-Score of at least 7000.
You achieved a High-Score of at least 8000.
You achieved a High-Score of at least 9000.
You quit during a live show.
You reached the second round of the show.
All 4 coaches turned round.
You reached the third round of the show.
You reached the last round of the show.
You completed every round of the show.
You chose a random song.
You warmed up your voice.
You are the Voice Of Germany.