diff --git a/.ots/810d26b7af9c5d306e77fec290d360c7ac876b2e.ots b/.ots/810d26b7af9c5d306e77fec290d360c7ac876b2e.ots
new file mode 100644
index 0000000..43650e5
Binary files /dev/null and b/.ots/810d26b7af9c5d306e77fec290d360c7ac876b2e.ots differ
diff --git a/.ots/commit-chain.txt b/.ots/commit-chain.txt
index d0f9c04..a6fee65 100644
--- a/.ots/commit-chain.txt
+++ b/.ots/commit-chain.txt
@@ -7,3 +7,9 @@ c0685dabfb48360a3abc103b75357f94e9f054b2:46aded7b9582bbed673843e2cf8a3f8fa742ad9
 4a6f5ed0c12315b0bc8a0fa5815ada1bd20e5963:db6f29e01a33d8ed8f127ff169d9f91d55e8a229
 db6f29e01a33d8ed8f127ff169d9f91d55e8a229:392ee723c3cf626d0e5281aa94771d7133bb345e
 392ee723c3cf626d0e5281aa94771d7133bb345e:392ee723c3cf626d0e5281aa94771d7133bb345e^1
+810d26b7af9c5d306e77fec290d360c7ac876b2e:c0685dabfb48360a3abc103b75357f94e9f054b2
+c0685dabfb48360a3abc103b75357f94e9f054b2:46aded7b9582bbed673843e2cf8a3f8fa742ad91
+46aded7b9582bbed673843e2cf8a3f8fa742ad91:4a6f5ed0c12315b0bc8a0fa5815ada1bd20e5963
+4a6f5ed0c12315b0bc8a0fa5815ada1bd20e5963:db6f29e01a33d8ed8f127ff169d9f91d55e8a229
+db6f29e01a33d8ed8f127ff169d9f91d55e8a229:392ee723c3cf626d0e5281aa94771d7133bb345e
+392ee723c3cf626d0e5281aa94771d7133bb345e:392ee723c3cf626d0e5281aa94771d7133bb345e^1
diff --git a/.ots/prev-commit.txt b/.ots/prev-commit.txt
index 79c74df..8b45759 100644
--- a/.ots/prev-commit.txt
+++ b/.ots/prev-commit.txt
@@ -1 +1 @@
-c0685dabfb48360a3abc103b75357f94e9f054b2
+810d26b7af9c5d306e77fec290d360c7ac876b2e
diff --git a/.ots/proof.ots b/.ots/proof.ots
index 407ebcf..fbc62a4 100644
Binary files a/.ots/proof.ots and b/.ots/proof.ots differ
diff --git a/backfill-proofs.sh b/backfill-proofs.sh
index 81ea0aa..a859ec4 100755
--- a/backfill-proofs.sh
+++ b/backfill-proofs.sh
@@ -37,6 +37,39 @@ chmod +x "$GENERATE_SCRIPT"
 # Ensure .ots directory exists
 mkdir -p .ots
 
+# Cache file for attestation status (avoids repeated ots info calls)
+STATUS_CACHE=".ots/.attestation-cache"
+if [ ! -f "$STATUS_CACHE" ]; then
+    echo "# Attestation status cache" > "$STATUS_CACHE"
+    echo "# Format: commit-hash:status:timestamp" >> "$STATUS_CACHE"
+fi
+
+# Function to check cached status
+get_cached_status() {
+    local commit="$1"
+    local cache_line=$(grep "^$commit:" "$STATUS_CACHE" 2>/dev/null | tail -1)
+    if [ -n "$cache_line" ]; then
+        local status=$(echo "$cache_line" | cut -d: -f2)
+        local timestamp=$(echo "$cache_line" | cut -d: -f3)
+        local now=$(date +%s)
+        local age=$((now - timestamp))
+        # Cache valid for 1 hour (3600 seconds)
+        if [ "$age" -lt 3600 ]; then
+            echo "$status"
+            return 0
+        fi
+    fi
+    return 1
+}
+
+# Function to cache status
+cache_status() {
+    local commit="$1"
+    local status="$2"
+    local now=$(date +%s)
+    echo "$commit:$status:$now" >> "$STATUS_CACHE"
+}
+
 echo "[ots-backfill] Scanning commit history..."
 
 # Get all commit hashes (oldest to newest)
@@ -55,18 +88,31 @@ for COMMIT in $COMMITS; do
     PROOF_FILE=".ots/${COMMIT}.ots"
     
     if [ -f "$PROOF_FILE" ]; then
-        # Check if already fully attested
-        STATUS=$(ots info "$PROOF_FILE" 2>&1 | grep -c "PendingAttestation" || echo "0")
+        # Check cached status first
+        CACHED_STATUS=$(get_cached_status "$COMMIT" || echo "")
         
-        if [ "$STATUS" -eq 0 ]; then
-            echo "  ✓ Already attested (skipping)"
+        if [ "$CACHED_STATUS" = "attested" ]; then
+            echo "  ✓ Already attested (cached, skipping)"
             continue
         fi
         
+        # Check if already fully attested (only if not cached or cache expired)
+        PENDING_COUNT=$(ots info "$PROOF_FILE" 2>&1 | grep -c "PendingAttestation" || echo "0")
+        
+        if [ "$PENDING_COUNT" -eq 0 ]; then
+            echo "  ✓ Already attested"
+            cache_status "$COMMIT" "attested"
+            continue
+        fi
+        
+        # Cache as pending
+        cache_status "$COMMIT" "pending"
+        
         # Try to upgrade existing proof (only contacts calendars if pending)
         echo "  Upgrading pending proof..."
         if ots upgrade "$PROOF_FILE" 2>/dev/null; then
             echo "  ✓ Upgraded to attested"
+            cache_status "$COMMIT" "attested"
             UPDATED=$((UPDATED + 1))
         else
             echo "  - Still pending (no upgrade available yet)"
@@ -76,6 +122,7 @@ for COMMIT in $COMMITS; do
         echo "  Generating new proof..."
         "$GENERATE_SCRIPT" "$COMMIT" "$PROOF_FILE" >/dev/null 2>&1
         echo "  ✓ Generated proof"
+        cache_status "$COMMIT" "pending"
         UPDATED=$((UPDATED + 1))
     fi
 done
diff --git a/test6.txt b/test6.txt
new file mode 100644
index 0000000..b351a1d
--- /dev/null
+++ b/test6.txt
@@ -0,0 +1 @@
+# Second test with cache