Stereophonics - Drowning Chords & Tabs

Stereophonics - Drowning
Album Pull the Pin (2007)
Awesome song, chords are very easy. I play them as barre chords.
Chords by soupdragon

Verse
Dm C
[ Tab from: https://www.guitartabs.cc/tabs/s/stereophonics/drowning_crd.html ]
Chorus
Dm C Bm Bb

that's it. 
No idea how he plays them, but those are definately the right chords.
If anyone does now how he plays them, tab it please!
-soupdragon