Problem displaying new custom post type

Hi guys,

I had existing custom post types, which I am able to query successfully. But newly registered custom post type does not show up, I have added 2 test posts, individually it shows up under post type site/slug/ but I want to display it on another page, results are not returning it there.

Following is the code I put for registering the new post type:

$custom_post_types = array('proof-concept' => array(
'labels' => array(
'name'          => 'Proof of Concepts',
'singular_name' => 'Proof of Concept'
),
'taxonomies' => array('industries', 'disciplines','services'),
'has_archive'=> true
))
foreach($custom_post_types as $id=>$custom_post_type){
		if(!isset($custom_post_type['public']))
			$custom_post_type['public'] = true;
		register_post_type( $id, $custom_post_type);

Please note custom_post_types array does have other post types I removed from the code. Am I missing something? Please help.