diff --git a/src/transformers/_common/timestamp.ts b/src/transformers/_common/timestamp.ts
index 5292120..a445613 100644
--- a/src/transformers/_common/timestamp.ts
+++ b/src/transformers/_common/timestamp.ts
@@ -1,11 +1,8 @@
 import type { RawBlock } from '../../types';
 
 export function transform(block: RawBlock): RawBlock {
-  const isoTimestamp = new Date(block.timestamp * 1000).toISOString();
-
   block.transactions = block.transactions.map((tx) => {
     tx.timestamp = block.timestamp;
-    tx.isoTimestamp = isoTimestamp;
     return tx;
   });