As per our rules, we should respect the French capitalisation rules. Consequently, the correct title is "Le Seigneur des anneaux : Les Anneaux de pouvoir".

Amazon is an American company who think that all the world has the same rules than them.

Hi,

Sorry, but you're wrong, many many titles on Prime Video (localized from US) haven't the same capitalization. So it depends, and here it's the original translation that is correct (you could check on full French website like Allocine : https://www.allocine.fr/rechercher/series/?q=le%20seigneur%20des%20anneaux)

Thanks.

As indicated in our rules, we need to respect the French capitalisation rules for the French titles.

Ok, but there are mistakes in your "rules" (in French there are not rules for proper nouns). This is not a sentence, it's a title, big difference in French. Also, il your rules, you say that the 1st rule is to respect the first broadcaster information, thing that you don't do here :( (Amazon have some guys in France to check spelling ;) )

A summary of the French rules for titles is available here. You can also find them here (rubrique "Titre d’œuvre" -> "Majuscules et minuscules")

You can also see the correct title on Wikipedia, which respect the French rules.