There is more than one artist with this name:

1. Omertà is a French band fronted by artist Florence Giroud.

https://omerta.bandcamp.com/

2. Omertà is a Latvian instrumental rock band formed in Rīga, Latvia in 2011 by former members from bands such as Zoltan and Wildborn.

Current members:

Renārs Lazda - guitars;
Kaspars Pētersons (Rebel Riot) - bass;
Einārs Latiševs - drums.

Former members:

Eduards Beķeris (Batra) - bass.

http://www.facebook.com/omertalv

3. Omertà is a post-metal band from Spain.

4. Omertà is a folk rock / pop rock band from the UK. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.