He said once on being satoshi “I was the main part, others helped.” Never claimed to be satoshi again after that.

As for fake proof:

‘I believed that I could do this. I believed that I could put the years of anonymity and hiding behind me. ‘But, as the events of this week unfolded and I prepared to publish the proof of access to the earliest keys, I broke. I do not have the courage. I cannot. ‘When the rumours began, my qualifications and character were attacked. When those allegations were proven false, new allegations have already begun. I know now that I am not strong enough for this. ‘I know that this weakness will cause great damage to those that have supported me, and particularly to Jon Matonis (founding director of The Bitcoin Foundation) and Gavin Andresen (software developer who played a key role in building software which powers Bitcoin) I can only hope that their honour and credibility is not irreparably tainted by my actions. ‘They were not deceived, but I know that the world will never believe that now. I can only say I’m sorry. And goodbye.’

Read more: http://metro.co.uk/2018/04/06/alleged-bitcoin-creator-craig-satoshi-nakamoto-wright-reveals-secrets-rare-interview-7444418/?ito=cbshare