In accordance with Heisenberg's Uncertainty principle, and the Copenhagen interpretation of the Schroedinger's Cat gedankenexperiment, your entry existed in a quantum state consisting of all possible entries, until I observed it, when it collapsed permanently into "If a blogger makes an entry in the forest, and no-one reads it, is it really there?"
All I can conclusively prove, sir, is that I exist. I think therefore I am. If that is all I can prove, then it follows that I can only prove that I read the entry first, as I can't prove anyone else exists. Therefore, I can only prove that I was the first (and so far only) to read the entry.