Url of a POST request

Question

Hello, good(a) day/afternoon/night!

I am developing a plugin to generate billets in Woocommerce, in case I need to send the data of a form to the bank in order to get the billet and display to the customer.

I chose to do this using PHP-Curl, which I thought was the best option. Well, I was able to send the form data via POST and receive the boleto, but there is one last thing missing, the URL generated by the bank, which is necessary to print a duplicate of the boleto, if necessary.

They know to inform me if it is possible to "catch" this URL with the Curl?

Follow my current code, if it helps

$fields = array com os dados do formulário

$url = 'https://geraboleto.sicoobnet.com.br/geradorBoleto/GerarBoleto.do';
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);

$result = curl_exec($ch); 

curl_close($ch);