Andy Anokye, who performed under the stage name Solo 45 and was part of the grime collective Boy Better Know, was found guilty at Bristol Crown Court of 30 charges over a two-year period.
The 33-year-old was unanimously convicted of 21 rape charges, five counts of false imprisonment, two counts of assault by penetration and two of assault occasioning actual bodily harm.
Anokye was arrested in 2017 after a woman claimed she had been raped at his waterfront apartment in Bristol.
Police seized mobile phones and a laptop and contacted other women.
During the four-month trial, jurors were shown videos filmed by Anokye on his phone.
The clips showed Anokye interrogating the women about previous sexual partners, slapping, insulting and raping them.
The jury of seven men and five women found him guilty of 30 of the 31 charges he was facing. He was acquitted of one charge of rape.
Prosecutor Christopher Quinlan QC told the jury: “Not one of the women from whom you have heard said that they consented to what he says is a game – the rape game.
The court heard from four victims, who described the use of weapons, holding them against their will, holding a cloth with bleach on to their face and waterboarding them.
The musician, wearing a blue tracksuit, did not react as the jury returned the verdicts after deliberating for almost 11 hours.
Sentencing was adjourned by Judge William Hart.
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