Yes, you are right.
I think its called "commercial Registration" or Bataqa Mansha in arabic.

it contains authorized signatures & Stamp sample.

its also called company ID.

but even this is not an NOC.
as far as I know, NOC is a govt. form filled and stamped by your company in favor of the new company you are going to work for. the other details will be filled by your new company for submission to Qatar N&R department.

cheers