Right after I got the conformation my call sign registration was approved I created basic profiles on some of the well-known Ham related websites. Some of these profiles are QRZ.com, HamQTH.com and QRZCQ.com. It is wise to have a profile on the QRZ.com and QRZCQ.com websites as these two websites are often used as a reference to check whether a call sign is authentic. I have also registered my call sign with LoTW, where my official registration has also been validated by the ARRL. This will hopefully give enough certainty for the other party that my call sign is official and assigned to me. If you have any doubts about our QSO, please contact me.
In addition to these international websites, I have also created a profile on a popular Dutch-speaking amateur forum, i.e. zendamateur.com. On this forum I occasionally post something or respond to messages in a running thread.