Freeze unseen music stress corpus and independently verified gated DTW experiment

tools/speech-rank/README.md

@@ -83,3 +83,13 @@ in the embedded ASR evidence and are independently checked; they do not authoriz
 fabricating or clamping DTW points. Missing/invalid DTW points exclude a window
 and prevent accepted scoring. Use a separate DTW report/output and retain the
 failed ordinary-v1 run. The frozen five sources/eight queries remain unchanged.
+
+The separately frozen `gated-dtw-v1` combination embeds exact manifest bytes
+with SHA `d3bf453f21dac03fd029344af2fe700480cf686d2ba5b5d7fcc79134dda1c563`.
+The ranker verifies component hashes and the original frozen VAD bytes, rebuilds
+all twelve speech windows from source intersections, requires explicit no-speech
+status for empty competitors, then independently reconstructs DTW points. All
+five sources remain mandatory; dropped windows, fabricated no-speech claims,
+tampered policy bytes and invalid points are rejected. This combination leaves
+the old gated base and ungated DTW policies unchanged. Structural token tests
+provide no new quality result; actual model inference remains a separate gate.