I have successfully switched my Site A over to Site B (a legacy domain i purchased). I recently have uncovered some shady link building practices in the Site B link profile.I am trying to find all historical backlinks to Site B pre-domain change so that i can disavow them and only keep the legitimate authoritative links from my original domain (Site A). With limited cooperation from the previous site owners of Site B, any thoughts as to how i should proceed in finding the spam links from before the domain change? 
How can I find a list of backlinks by date for a domain?
seo;domains;backlinks;spam