diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/ots/OkHttpBlockstreamExplorer.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/ots/OkHttpBlockstreamExplorer.kt
index 4e09ab747..43faba016 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/ots/OkHttpBlockstreamExplorer.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/ots/OkHttpBlockstreamExplorer.kt
@@ -48,7 +48,8 @@ class OkHttpBlockstreamExplorer(
             return it
         }
 
-        val url = "$BLOCKSTREAM_API_URL/block/$hash"
+        val usingTor = forceProxy(BLOCKSTREAM_API_URL)
+        val url = "${getAPI(usingTor)}/block/$hash"
         val client = HttpClientManager.getHttpClient(forceProxy(url))
 
         val request =
@@ -92,8 +93,9 @@ class OkHttpBlockstreamExplorer(
             return it
         }
 
-        val url = "$BLOCKSTREAM_API_URL/block-height/$height"
-        val client = HttpClientManager.getHttpClient(forceProxy(url))
+        val usingTor = forceProxy(BLOCKSTREAM_API_URL)
+        val url = "${getAPI(usingTor)}/block-height/$height"
+        val client = HttpClientManager.getHttpClient(usingTor)
 
         val request =
             Request
@@ -119,5 +121,13 @@ class OkHttpBlockstreamExplorer(
 
     companion object {
         private const val BLOCKSTREAM_API_URL = "https://blockstream.info/api"
+        private const val MEMPOOL_API_URL = "https://mempool.space/api/"
+
+        fun getAPI(usingTor: Boolean) =
+            if (usingTor) {
+                MEMPOOL_API_URL
+            } else {
+                BLOCKSTREAM_API_URL
+            }
     }
 }
diff --git a/quartz/src/main/java/com/vitorpamplona/quartz/ots/OpenTimestamps.java b/quartz/src/main/java/com/vitorpamplona/quartz/ots/OpenTimestamps.java
index d422144ce..3118c99a0 100644
--- a/quartz/src/main/java/com/vitorpamplona/quartz/ots/OpenTimestamps.java
+++ b/quartz/src/main/java/com/vitorpamplona/quartz/ots/OpenTimestamps.java
@@ -379,8 +379,8 @@ public class OpenTimestamps {
 
         try {
             String blockHash = explorer.blockHash(height);
-            blockInfo = explorer.block(blockHash);
             Log.i("OpenTimestamps", "Lite-client verification, assuming block " + blockHash + " is valid");
+            blockInfo = explorer.block(blockHash);
         } catch (Exception e2) {
             e2.printStackTrace();
             throw e2;