One of our competitors constantly copies all our website content.Now, I assume the trouble is to proof that we wrote the content first and  that it is not the other way round.I checked on http://www.archive.org, but there is nothing. Any other way to proof that?FYI: We are a Swiss company, so different laws will apply.Solution: Found later You can upload your content to this service and that they basically time-stamp it.  Another way we found is to just print out your copy/design etc. Put it into an envelope and send it to ourselves (without actually opening it later of course).
Website content copied - How can I prove that I wrote it?
content;copyright
You can consider notifying about your site updates on social media (Twitter, Facebook etc.) as soon as you post. The timestamp recorded there can be a fair indicator that you wrote first.Assuming, popular search engines already index your web-pages regularly (use the site operator, site:example.com, to find out) the date in the cached copy can be used as a rough indicator of when the content was published.Update: Through Google Webmaster Tools, you can enforce a setting to have Googlebot crawl your site too often or manually ask Google to crawl a specific page or site.As this article suggests, you can write a polite email to your competitors to desist from copying & then if that doesn't help, send a formal DMCA letter to his web hosting company and also possibly to his advertising partner(s).