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The England captain looked off the pace in the Three Lions' early games at the tournament and did not score his first goal until late on against Germany in the last 16.
Kane then scored twice against Ukraine in the quarter-finals in Rome on Saturday night and looks back to his best once more.
Despite his early drought, the wantaway Tottenham striker says his belief in his own ability never wavered.
"I have kind of had to do that my whole career, since I was a kid," Kane told BBC Radio 5 Live of proving people wrong.
"I've had to prove people wrong to get to where I am now. I have full belief in who I am as a player and what I can do on the pitch, what I do to help the team.
"It's not so much about proving other people wrong. It's about proving to myself again that I am as good as I can be, I can score at any level, I've done it at any stage.
"When you go three or four games without scoring, you want to score and put that to bed and at a major tournament it gets heightened even more. But the fact that I have so much self-belief in myself and my team, I don't really let that stuff affect me.
"Of course when you score in a big game, it is natural the emotions come out and you feel free and a lot of people then say it kick-starts you to score a couple in the quarter-final.
"Whether I score or don't score I always feel I am ready for the next opportunity. It's great that I am scoring now and obviously a big semi-final to come but I'll be the same player if I scored or didn't score."
Kane will look to keep his goalscoring run going when England face Denmark in Wednesday's semi-final at Wembley - but the striker is expecting a tough test.
"The next game is always the toughest game," he said.
"We did great against Germany and got a great result - but the next toughest game was Ukraine and we did well in that game.
"So now the next hardest game is Denmark. We are playing for the chance to play in a European Championship final and Denmark have been on a great run since the first couple of games.
"We'll probably go into this game as favourites but it won't be an easy game for sure. We know what Denmark are and what they can bring.
"I try not to let my mind get too far ahead. But I'd be lying if I said I hadn't thought about it (winning the Euros) but the whole playing for England and captaining England is a dream.
"As a kid growing up you have a vision of what you want to do and what you dream about and this is it - playing for your country and captaining your country at a major tournament, having games at Wembley, scoring goals and winning games."