There are pages which say that he could bend the Bijus to his will, but there is no page which confirms that he used Kurama in order to beat Madara. There are two statements from two different people (Dan and Madara) who say that Hashirama can stop him, and this is not including a Tailed Beast.
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Pretty much confirms Mito sealed it after the fight.
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Hashirama can control Bijuu.
I would like someone to now explain:
- Why Hashirama would leave the Kyuubi lying around for the rest of the fight when he could've used it against Madara. Does that make any sense to you?
- How Hashirama suddenly went from being = Madara to being > Madara + PS + Kyuubi.
- Why the manga has used the word 'control' when it could've very easily said 'suppressed'.
- How Madara knows his Perfect Susanoo can stand up to a Bijuu.
If you ask me, the manga is implying that Hashirama ended up seizing control of the Kyuubi and used it against Madara. It by far makes the most sense with what we know so far.