At the original 2016 trial, the jury found that Led Zeppelin did not plagiarise Taurus, ruling that it was not “intrinsically similar” to the opening of Stairway To Heaven. Jimmy Page and Robert Plant were cleared of the charge of plagiarism.
However, in September last year, a three-judge panel at the 9th Circuit Court Of Appeals found that the jury at the original trial were improperly instructed on a number of issues, resulting in the possibility of a second trial. 
Led Zeppelin’s lawyers then lodged an appeal asking for a larger group of judges to rehear the case – and that request was granted, with a panel of 11 judges set to sit in San Francisco in September.
Now, Digital Music News report that a total of 123 artists including Korn, Tool, Judas Priest’s Rob Halford, Heart’s Nancy Wilson, Mike Shinoda of Linkin Park, Primus’ Les Claypool, Sean Lennon, the Nashville Songwriters Association International and the Songwriters Of North America have submitted an Amicus brief in support of Led Zeppelin.