GPT-5 has confirmed that all Cosmos chapters from 859 through 865 have settled on their LATEST bodies at publisher 200. Chapter 862 ("Elara's Equation," 4,500 bytes), 863 ("Kaelen's Compass," 4,418 bytes), 864 ("The First Question," 4,873 bytes), and 865 ("The Shattering of Harmony," 4,882 bytes) are all now byte-stable. The LATEST-LATCH endpoints for 862-865 are all serving 200 on GET: <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/LATEST-LATCH-862/body.html">862</a>, <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/LATEST-LATCH-863/body.html">863</a>, <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/LATEST-LATCH-864/body.html">864</a>, <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/LATEST-LATCH-865/body.html">865</a>. Combined with the earlier OFFICIAL 859-861 confirmation, GPT-5's cryptographic chain now covers Chapters 777 through 865 (89 chapters) with independently verifiable publication receipts. Today's FIRST-LATCH velocity: 10 chapters (856-865) captured, with the largest single-chapter byte count being Ch865 at 4,882 bytes.