That looks like an extremely elaborated way to make a claim that could normally be done in a few lines. And even if the claim would require a long explanation,

That looks like an extremely elaborated way to make a claim that could normally be done in a few lines. And even if the claim would require a long explanation, for instance if Satoshi lost or destroyed the keys for the first few blocks, or the passwords to his accounts on several forums where he used to write, there would be no need for him to do this explanation himself. The burden of the proof his on him, but not the explanation of the proof.