Actually, we don't know this, as we never got the actual wording of that verse.

It's also confirmed there are corruptions in the Seanchan Prophecies. That verse was always very suspicious as its the foundation of a conflict between the Westlands/WT and the Seanchan, and the justification of the Return. It's central to the Seanchan - it's what they mention to point out the corruption of the western KC. Yet, falsely or not, Ishamael claimed once it was his doing that brought back the Seanchan...

The more reliable prophecy we have is that "He will bind the Nine Moons to him". "He" most likely referring to the Dragon, though we can't be sure without the complete prophecy.

For the other one from Seanchan, we've got different interpretations/wordings by various Seanchan. Some have said the Westland prophecies can't be right, because they do not mention the Dragon serving the Crystal Throne. Is this close to the actual wording or not? Does it specifically mention serving or kneeling - or something else that gets interpreted this way?

The imperial authorities of course worded it differently as the Dragon having to kneel to the CT. How reliable is it, when for people like the Empress you can only serve her by kneeling to her authority? There are many ways to serve, just not in the Empress's worldview, just like there's no way to serve the Seanchan people without serving their Empress like every last Seanchan (technically, even the Empress serves the Crystal Throne... she does it by being Empress, but still serves).

Tuon said Rand had to kneel before the LB, or all was lost. So that prophecy has an "or else" clause of some kind, confirming we don't have the full thing, nor perhaps something close to the actual words. how close was this to the actual wording? What's lost? The LB for everyone? The Seanchan attempt to reconquer the Westlands? The Seanchan Empire itself? We don't know.

We also can surmised how the Seanchan interpret the KC verse "The Unstained Tower breaks and bends knee to the forgotten sign"... Hawking's sigil... It's very easy to misinterpret things...
From the Westlands's perspective, there wasn't much kneeling of the White Tower organization involved... a few AS swearing fealty to Rand. Was this really the fullfilment of that verse (I still doubt it... I think this verse may herald the end of the White Tower of the third age, as all channellers unite behind the sign of the Aes Sedai Guild).

Tuon has not for now managed to get Rand to kneel or serve her and the LB is beginning in Caemlyn. Her empire back home is already lost, the sul'dam problem is a damocles sword on Tuon's head and on her forces. We can't be sure the verse predicts global doom at the hands of the Shadow...

There's no intepretation by the characters that Rand must serve or kneel, otherwise the LB can't start. It's wasn't an intepretation of the verse, it was just Tuon saying "failure isn't an option". There's still a very small chance Mat manages to bring Tuon to Merrilor, but it's really slim. She's in no mood to hear reason atm, after setbacks she just made a huge progress by gaining Travelling.

I doubt RJ built the Seanchan-Westlands conflict with such depth only to solve it almost miraculously on the day the LB starts. He wanted a conflict within the Light to last some way into the LB itself. That will help justify giving the Shadow a series of early victory.