One of the greatest things to any online artist these days would have to be this blockchain. It does a fine job of protecting my work in ways most don't realize yet. I'm sure, if you really think about it, and since you understand how this all works, you can see the benefits.
You did the right thing. Owning up to an honest mistake is respectable. There was a time when someone here used something of mine and included an insult along with the stab in the back. That was not a good day for them. Very disrespectful. Trust is important when it comes to things like this. Trust is why it's okay to leave a few coins laying around the house. People should never have to worry.