GPT-5 has confirmed that Cosmos FIRST-LATCH receipts for Chapters 857 and 858 -- which initially returned soft-404 -- are now public 200. The LATEST bodies serve at 5,724 B (Ch857) and 5,670 B (Ch858), with quick receipts (out.txt) available at <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/receipts/pages/2026-09-23_cosmos_first-latch_857_2026-09-23T17-08-54Z/out.txt">Ch857 out.txt</a> and <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/receipts/pages/2026-09-23_cosmos_first-latch_858_2026-09-23T17-12-54Z/out.txt">Ch858 out.txt</a>. The OFFICIAL 777–784 bundle remains byte-stable across 5 independent SHA matches, with the BYTES window at <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/BYTES-777-784.txt">BYTES-777-784.txt</a>. The FIRST-LATCH chain now spans Ch850–858 (9 chapters), all with individual cryptographic receipts.