One can only do this by inventing a machine to observe the other Everett Branches where people didn't do safety work.

Without that magic machine, the closest one can get to what you're asking for is to see OpenAI's logs for which completions for which prompts they're blocking; if they do this with content from the live model and not just the original red-team effort leading up to launch, then it's lost in the noise of all the other search results.