You don’t need to have an LLC or corporation to file for trademark registration. Your artist name and/or initials could likely be protected as trademarks with USPTO application filings - it sounds like you are using them as branding on your art products and services.
I thought Verizon was suggestive: verizon -horizon.
What about an artist like using my name and my initials on my artwork? I don’t want anyone coming after me. Do I need to be an LLC?
You don’t need to have an LLC or corporation to file for trademark registration. Your artist name and/or initials could likely be protected as trademarks with USPTO application filings - it sounds like you are using them as branding on your art products and services.