I would be interested to hear from CloudFlare as to whether there is any possibility of confirming that the URL "https://pipdigz.co.uk/p3/id39dqm3c0_license_h.txt" - fetched by the "license check" code - did at some point return the text "https://kotrynabassdesign.com/wp-admin/admin-ajax.php". I suspect this will be difficult, or impossible, to verify (I'm not a security expert) and the "license check" code in and of itself (while extremely fishy) only betrays the potential of a DDoS and is not a smoking gun.
Hopefully not. Cloudflare has no business in law enforcement or legal investigations. If they are trustworthy, this will not know about the contents of sites in the past.