diff --git a/apps/master-api/src/opensubtitles/org-client.ts b/apps/master-api/src/opensubtitles/org-client.ts
index 9d402fe..7c63883 100644
--- a/apps/master-api/src/opensubtitles/org-client.ts
+++ b/apps/master-api/src/opensubtitles/org-client.ts
@@ -150,8 +150,11 @@ function mapRow(row: OrgRow, fallbackLang: string): SubtitleHit | null {
 
 function normalizeImdb(id?: string | null): string | null {
   if (!id) return null;
-  const digits = String(id).trim().replace(/^tt/i, "").replace(/^0+(?=\d)/, "");
-  return /^\d+$/.test(digits) ? digits : null;
+  const digits = String(id).trim().replace(/^tt/i, "").replace(/\D/g, "");
+  if (!digits) return null;
+  // OS.org URLs expect ≥7-digit zero-padded IDs; stripping zeros causes a
+  // broken 302 to host "_" and silent empty search results.
+  return digits.padStart(7, "0");
 }
 
 /** Legacy REST uses OpenSubtitles language ids (`dut` = Dutch). */