There are many different bands/artists called Cobra:
These are photos from concerts where COBRA played, so they may be of other bands that played the concert as well.
Download Festival Madrid 2017 Jun 22 - 24, 2017 Madrid, Madrid, Spain Uploaded by Bisley
Hellfest 2014 Jun 20 - 22, 2014 Clisson, Pays de la Loire, France Uploaded by Sheb