Corrupting blood is a bleed effect
It is not. It technically never was, but it has been sort of half treated as one for a long time, as a result of a descision a long time ago to let staunching flasks also remove & prevent corrupted blood on the basis that both debuffs had blood-related theming.
Previously, things with corrupted blood on them counted as "bleeding" for most purposes (but not all). The corrupted blood debuff was never the bleeding debuff, and was not an ailment (bleeding is). Anything that removed bleeding also removed corrupted blood, and as a weird result of this, effects that remove a random ailment could remove corrupted blood despite it not being an ailment at all (regardless of whether you were actually bleeding as well). Nothing that specificially scaled damage with bleeding scaled corrupted blood, but some things that modified how damage was taken from bleeding did.
Obviously with giving players (easier) access to inflict the corrupted blood debuff in 3.14 we couldn't leave things like that and expect people to understand. It was all a bit of a mess, and this is low-key one of my favourite changes in 3.14, because I';ve wanted to do it for a while and everything makes a lot more sense now - there's bleeding (you stabbed something and its blood is coming out), and there's corrupted blood (you splash your blood on something else and that blood magically hurts it), and nothing conflates the two. The staunching flask explicitly states that it applies to both debuffs (as does anything else that applies to both), but things that only refer to bleeding will now only affect bleeding, and things that only refer to corrupted blood will only affect corrupted blood.