View difference between Paste ID: yPi5RfAa and 0Qjtai2t

 This is the functions.php from the plugin that creates the CPT and the metaboxes
 <?php
 
 /*
 Plugin Name: Scrutinies Functions
 */
 
 add_action( 'init', 'register_cpt_artist' );
 
 function register_cpt_artist() {
 
     $labels = array(
         'name' => _x( 'Artists', 'artist' ),
         'singular_name' => _x( 'Artist', 'artist' ),
         'add_new' => _x( 'Add New', 'artist' ),
         'add_new_item' => _x( 'Add New Artist', 'artist' ),
         'edit_item' => _x( 'Edit Artist', 'artist' ),
         'new_item' => _x( 'New Artist', 'artist' ),
         'view_item' => _x( 'View Artist', 'artist' ),
         'search_items' => _x( 'Search Artists', 'artist' ),
         'not_found' => _x( 'No artists found', 'artist' ),
         'not_found_in_trash' => _x( 'No artists found in Trash', 'artist' ),
         'parent_item_colon' => _x( 'Parent Artist:', 'artist' ),
         'menu_name' => _x( 'Artists', 'artist' ),
     );
 
     $args = array(
         'labels' => $labels,
         'hierarchical' => false,
         'description' => 'Interviews with Catholic artists.',
         'supports' => array( 'title', 'editor', 'excerpt', 'thumbnail', 'trackbacks', 'custom-fields', 'comments' ),
         'taxonomies' => array( 'category', 'specialty' ),
         'public' => true,
         'show_ui' => true,
         'show_in_menu' => true,
 
 
         'show_in_nav_menus' => true,
         'publicly_queryable' => true,
         'exclude_from_search' => false,
         'has_archive' => true,
         'query_var' => true,
         'can_export' => true,
         'rewrite' => true,
         'capability_type' => 'post'
     );
 
     register_post_type( 'artist', $args );
 }
 
 /**
  * Either declare the $prefix variable globally here, or else
  * declare it within the function itself (NOT globally).
  *
  * The main reason for a global $prefix variable is if you're creating
  * lots of metaboxes using different functions, and you want to set the
  * $prefix in just one place.
  */
 global $prefix;
 $prefix = '_cmb_'; // Prefix for all fields
 function be_sample_metaboxes( $meta_boxes ) {
 	global $prefix;
 	$meta_boxes[] = array(
 		'id' => 'test_metabox',
 		'title' => 'Test Metabox',
 		'pages' => array('artist'), // post type
 		'context' => 'normal',
 		'priority' => 'high',
 		'show_names' => true, // Show field names on the left
 		'fields' => array(
 			array(
 				'name' => 'Test Text',
 				'desc' => 'Dummy text to see what happens',
 				'id' => $prefix . 'test_text',
 				'type' => 'text'
 			),
 		),
 	);
 
 	return $meta_boxes;
 }
 add_filter( 'cmb_meta_boxes', 'be_sample_metaboxes' );
 
 // Initialize the metabox class
 add_action( 'init', 'be_initialize_cmb_meta_boxes', 9999 );
 function be_initialize_cmb_meta_boxes() {
 	if ( !class_exists( 'cmb_Meta_Box' ) ) {
 		require_once( 'lib/metabox/init.php' );
 	}
 }
 
 This is the single-artist.php code:
 <?php
 /*
  * Template Name: Artist
  * This template displays Artist Details
  */
 
 remove_action('genesis_after_post_content', 'genesis_post_meta'); //remove post-meta
 remove_action('genesis_before_post_content', 'genesis_post_info'); //remove post-info
 add_action('genesis_after_post_content', 'child_get_artists_field'); //display meta-box content after the content
 
 //Function to show the content
 function child_get_artists_field() {
         echo '<strong>Bacon'. genesis_get_custom_field('_cmb_test_metabox)') .'</strong>';
 }
 
 genesis(); // requires Genesis 1.3+
 ?>