Tory Lanez is speaking out against his 10-year prison bid ... but he's not going to apologize for the Megan Thee Stallion shooting, as he still insists he didn't do it.
The Canadian rapper broke his silence Thursday with a lengthy Instagram post, promising to bounce back after he completes his stretch in a California state prison, and maintaining his innocence.
Tory says he's not apologizing for being found guilty of shooting Meg ... he says he was wrongfully convicted. He adds, "I remain on the stance that I refuse to apologize for something that I did not do."
As you know ... the judge sentenced Tory Tuesday to 10 years in prison, though his high-powered attorney Jose Baez says the plan is to appeal that sentence.
Tory says the conviction is just another moment where he has his back against the wall, but he says he's always overcome adversity and is promising to do so here.
He declares, "I refuse to stop fighting till I come out victorious."
TMZ broke the story ... Tory's lawyer says he's leaning on his faith and his family and friends as he begins serving his sentence.
Tory says "tough times don't last, tough people do" ... and he's thanking his supporters and promising to see them soon.
How soon? Well, with good behavior -- and due to prison overcrowding -- he won't have to do the full 10 years ... however, whatever he serves won't be a walk in the park.