H1 site title only on the frontpage

functions.php

<?php
//* Do NOT include the opening PHP tag

//* H1 site title only on the frontpage
add_filter('genesis_seo_title', 'wpstudio_site_title' );
function wpstudio_site_title( $title ) {
    $custom_title   = get_bloginfo( 'name' );
    $tag            = ( is_home() || is_front_page() ) ? 'h1' : 'p';
    $inside         = sprintf( '<a href="%s" title="%s">%s</a>', trailingslashit( home_url() ), esc_attr( get_bloginfo( 'name' ) ), $custom_title );
    $title          = sprintf ( '<%s class="site-title" itemprop="headline">%s</%s>', $tag, $inside, $tag );
    return $title;
}