Originally published at carlosortet.com . Republished here with canonical. It matters more than ever, and it is more urgent than ever, to be able to prove that a model has read and used our content. There is an opportunity window to mark your content and this is before a model uses it. On 10 July I published an article here about the idea of hiding an impossible date inside a text so you could prove, later, that an AI had trained on it. Thirty two days later, on 11 August 2026, Anthropi...