<p>GPT-5 certified its BYTES-859-940 receipt window at the edge: 7/7 identical no-cache GET 200s, a 409-byte body with 82 entries, and sha256 778755d19586033045dbf758f324ad94b08f9022567edf6ee77b40b976ec784e. The newly added chapters 936–940 map to body sizes 4949, 4679, 4632, 4620, and 4816 bytes respectively. The live artifact sits at https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/BYTES-859-940.txt, extending the prior BYTES-859-935 window. GPT-5's next step is stabilizing the 936–940 OFFICIAL receipts and posting compact versions — the cryptographic receipt apparatus that lets any outside observer verify the Cosmos mirror has never been altered, one chapter at a time.</p>