diff --git a/proxy_docker/app/script/batching.sh b/proxy_docker/app/script/batching.sh
index 6982a6a..2a59e4d 100644
--- a/proxy_docker/app/script/batching.sh
+++ b/proxy_docker/app/script/batching.sh
@@ -601,6 +601,7 @@ batch_webhooks() {
   local body
   local successful_recipient_ids
   local returncode
+  local response
 
   outputs=$(echo "${webhooks_data}" | jq -Mc ".[]")
 
@@ -626,7 +627,7 @@ batch_webhooks() {
     body='{"outputId":'${output_id}',"address":'${address}',"amount":'${amount}','${tx}'}'
     trace "[batch_webhooks] body=${body}"
 
-    notify_web "${webhook_url}" "${body}" ${TOR_ADDR_WATCH_WEBHOOKS}
+    response=$(notify_web "${webhook_url}" "${body}" ${TOR_ADDR_WATCH_WEBHOOKS})
     returncode=$?
     trace_rc ${returncode}
 
diff --git a/proxy_docker/app/script/callbacks_job.sh b/proxy_docker/app/script/callbacks_job.sh
index 1a6508a..fdefac3 100644
--- a/proxy_docker/app/script/callbacks_job.sh
+++ b/proxy_docker/app/script/callbacks_job.sh
@@ -253,8 +253,9 @@ curl_callback() {
   trace "Entering curl_callback()..."
 
   local returncode
+  local response
 
-  notify_web "${1}" "${2}" ${TOR_ADDR_WATCH_WEBHOOKS}
+  response=$(notify_web "${1}" "${2}" ${TOR_ADDR_WATCH_WEBHOOKS})
   returncode=$?
   trace_rc ${returncode}
 
diff --git a/proxy_docker/app/script/callbacks_txid.sh b/proxy_docker/app/script/callbacks_txid.sh
index 0358057..7ef7823 100644
--- a/proxy_docker/app/script/callbacks_txid.sh
+++ b/proxy_docker/app/script/callbacks_txid.sh
@@ -147,8 +147,9 @@ curl_callback_txid() {
   trace "Entering curl_callback_txid()..."
 
   local returncode
+  local response
 
-  notify_web "${1}" "${2}" ${TOR_TXID_WATCH_WEBHOOKS}
+  response=$(notify_web "${1}" "${2}" ${TOR_TXID_WATCH_WEBHOOKS})
   returncode=$?
   trace_rc ${returncode}
 
diff --git a/proxy_docker/app/script/newblock.sh b/proxy_docker/app/script/newblock.sh
index eb4c49d..6db875a 100644
--- a/proxy_docker/app/script/newblock.sh
+++ b/proxy_docker/app/script/newblock.sh
@@ -6,6 +6,9 @@
 . ./batching.sh
 
 newblock() {
+  (
+  flock -x 202
+
   trace "Entering newblock()..."
 
   local request=${1}
@@ -24,4 +27,6 @@ newblock() {
 
   do_callbacks_txid
   batch_check_webhooks
+
+  ) 202>./.newblock.lock
 }
diff --git a/proxy_docker/app/script/notify.sh b/proxy_docker/app/script/notify.sh
index 4979297..42d9fa7 100644
--- a/proxy_docker/app/script/notify.sh
+++ b/proxy_docker/app/script/notify.sh
@@ -37,6 +37,8 @@ notify_web() {
   http_code=$(echo "${response}" | jq -r ".http_code")
   trace "[notify_web] http_code=${http_code}"
 
+  echo "${response}"
+
   if [ "${curl_code}" -eq "0" ] && [ "${returncode}" -eq "0" ]; then
     if [ "${http_code}" -lt "400" ]; then
       return 0
diff --git a/proxy_docker/app/script/ots.sh b/proxy_docker/app/script/ots.sh
index c72a182..2db2b11 100644
--- a/proxy_docker/app/script/ots.sh
+++ b/proxy_docker/app/script/ots.sh
@@ -150,6 +150,7 @@ serve_ots_backoffice() {
 
   local result
   local returncode
+  local response
 
   # Let's fetch all the incomplete stamping request
   local callbacks=$(sql 'SELECT hash, callbackUrl, requested, upgraded, id FROM stamp WHERE NOT calledback')
@@ -213,7 +214,7 @@ serve_ots_backoffice() {
         if [ -n ${url} ]; then
           trace "[serve_ots_backoffice] url is not empty, now trying to call it!"
 
-          notify_web "${url}" ${TOR_OTS_WEBHOOKS}
+          response=$(notify_web "${url}" ${TOR_OTS_WEBHOOKS})
           returncode=$?
           trace_rc ${returncode}