diff --git a/proto/iotics/api/search.proto b/proto/iotics/api/search.proto
index 502a0d6..5b21129 100644
--- a/proto/iotics/api/search.proto
+++ b/proto/iotics/api/search.proto
@@ -149,8 +149,6 @@ message SearchResponse {
     repeated FeedDetails feeds = 10;
     // Input details. Included with response type: FULL
     repeated InputDetails inputs = 11;
-    // Twin createdAt timestamp.
-    google.protobuf.Timestamp createdAt = 12;
     // Twin updatedAt timestamp.
     google.protobuf.Timestamp updatedAt = 13;
   }
diff --git a/proto/iotics/api/twin.proto b/proto/iotics/api/twin.proto
index c5508d3..386c4b5 100644
--- a/proto/iotics/api/twin.proto
+++ b/proto/iotics/api/twin.proto
@@ -69,8 +69,6 @@ message ListAllTwinsResponse {
     GeoLocation location = 3;
     // Twin custom properties.
     repeated Property properties = 5;
-    // Twin createdAt timestamp.
-    google.protobuf.Timestamp createdAt = 6;
     // Twin updatedAt timestamp.
     google.protobuf.Timestamp updatedAt = 7;
   }
@@ -183,8 +181,6 @@ message DescribeTwinResponse {
     // Custom properties associated with this twin.
     repeated Property properties = 6;
 
-    // Twin createdAt timestamp.
-    google.protobuf.Timestamp createdAt = 7;
     // Twin updatedAt timestamp.
     google.protobuf.Timestamp updatedAt = 8;
   }