refresh card (through block-8762400)

README.md

@@ -41,10 +41,10 @@ scheme: they were **rebuilds**, not byte mirrors, and are known to differ from
 the scored tars (see the repo issue history). Use the `-block-<N>` folders for
 exact replay.
 
-## Latest revealed — `2026-07-28` (block 8719200)
+## Latest revealed — `2026-08-03` (block 8762400)
 
-- **series:** 2896
-- **sha256:** `bf5258612d7d9be71764a65caa2966ac114a4f559baad7082171af6025b1ad66`
+- **series:** 3516
+- **sha256:** `b6ee2baf555a028dc9a918b3516ccddc65d96a48b1848da5f64734866500f106`
 
 > This is an **evaluation** set, not training data. Publishing it to train on
 > would contaminate the benchmark it exists to measure.