dcvcheck.com has no TXT records.
Question and response
Question
dig dcvcheck.com. TXT
Answer
The response has no answer records.
Authority
dcvcheck.com. 180 SOA ns10.digicertdns.com. dns.digicertdns.com. 2016735318 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0