After two days of deliberations, the nine-member federal jury determined Monday that the underlying beat in the two songs was substantially similar.
The following year, Gray and collaborators Chike Ojukwu and Emanuel Lambert sued Perry and her colleagues over the track, claiming they had used the beat from Gray's 2008 track "Joyful Noise", released under the nom de plume Flame.
Perry's attorneys refuted this accusation, saying that they were "trying to own basic building blocks of music, the alphabet of music that should be available to everyone".
During Perry's testimony, her attorneys attempted to play audio of "Dark Horse" but were thwarted by technical difficulties.
The jury agreed with the prosecution that nearly half of Perry's hit song featured both a beat and instrumental lines that were "substantially similar" to Gray's rap song.
Capital One breach affects 100 million in US , woman arrested
This report comes in the wake of news that Equifax may have to pay up to $700 million over a 2017 data breach, according to CNET . About 140,000 Social Security numbers were accessed and 80,000 bank account numbers from credit card customers, Capital One said.
Katy Perry's "Dark Horse" is undergoing an infringement trial against a Christian rapper named Flame. The song, which features rapper Juicy J, is one of Perry's biggest hits, having reached No. 1 on the Billboard charts in 2014.
In the end, the jury declared that the "Joyful Noise" beat was original enough to constitute copyrighting and that the song was widely enough distributed that someone on Perry's team could have heard it.
As of this report, there's no confirmation that Perry will appeal the verdict.
At one stage, the speaker system in the courtroom broke, which is a bit of a problem when you're trying to decide whether two songs sound the same, so Perry offered to perform it live for the audience. The song Dark Horse had won Katy Perry many awards and it was a chartbuster.
The judge said various issues in the case are "questions of fact to be resolved by the jury".