Oracle v. Google did break Oracle's way on API copyrightability, but the precedent is from the Federal Circuit (because there were also-appealed patent claims),

Oracle v. Google did break Oracle's way on API copyrightability, but the precedent is from the Federal Circuit (because there were also-appealed patent claims), and they wouldn't end up hearing most subsequent copyright cases... so it's all pretty murky at best. Despite their occasional enthusiasm for overturning the Federal Circuit, the Supreme Court denied cert in the case, so this probably won't be settled any time soon.