I don't think anyone here is accusing you of being a copycat, but the similarities in the vocals are definitely present and something you'll need to either learn to avoid or learn to accept.
For starters, it seems your singing voice just inherently has a Staley-meets-Wylde-with-a-touch-of-Cornell sort of timbre to it, even
before technique or note choice enter into the equation, but when they
do, it's eerie. The way you deliver the verse melody here is
very much in the fairly exclusive
Staley school, and even your choice of harmony lines are a bit similar to those of Jerry Cantrell.
I don't doubt that you arrived at your style independently and spontaneously, but the more you say you don't hear the similarities the more it gets to be like someone going around saying "Ich bin ein Berliner" in a sharp Massachusetts accent while protesting that he's never heard of JFK. The similarities are there, and intentionally or not, you're playing into them. But you enjoy singing the way you do, right, and people enjoy hearing you sing the way you do, so how can that be a bad thing? Own it.