Additional data for anonymous submission
There are three criteria: the solution must obscure your identity, it must not allow you to learn anything about the reviewers, and the second criterion must be common knowledge.

Any attempt to distribute files yourself through the web will fail to satisfy these conditions.  For example, if you use a website you own (under a pseudonym, say), then you can inspect the logs.  Even if you have arranged to use a service that will not provide any logs or allow you to tag pages or link to outside services, the reviewers may not notice that you have done so, and they may not even be willing to believe that you are not doing something tricky.

So this is a problem you cannot solve yourself.  You should get in touch with the program committee chair and ask whether the committee could make this data available to the reviewers.  As long as it goes through them, it doesn't matter how they provide it.