Solved, or the solution that worked for me:
in Katalon Recorder:
Command: check
Target: id=(unchanged)
Command: verifyChecked
Target: id=(unchanged)
The log:
</head>
<body>
<h4 class="log-info">[info] Executing: | check | id=cActual2 | |</h4><h4 class="log-info">[info] Executing: | verifyChecked | id=cActual2 | |</h4>