diff --git a/src/constants.ts b/src/constants.ts
index a1b05e6b..d80c4590 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -28,3 +28,16 @@ export const JWT_IGNORE_URLS = ['/token', '/docs', '/cron', '/internal', '/healt
 export const SWAGGER_PROD_IGNORE_URLS = isAdminMode ? ['/token', '/cron'] : ['/cron'];
 
 export const VERCEL_MAX_DURATION = 300;
+
+// estimate time: 2024-04-03 09:45:17
+// ref: https://mempool.space/testnet/block/000000000000000493ba5eebf0602f3e0e5381dd35f763a62ca7ea135343a0d6
+export const BTC_TESTNET_SPV_START_BLOCK_HEIGHT = 2584900;
+
+// estimate time: 2024-06-13 18:31:56
+// ref: https://mempool.space/signet/block/000000b2af39a66ec81d414b102804d975c5c4527adfd9bd3cabf2b7b4634737
+// Signet BTC SPV deployment time: https://pudge.explorer.nervos.org/transaction/0x61efdeddbaa0bb4132c0eb174b3e8002ff5ec430f61ba46f30768d683c516eec
+export const BTC_SIGNET_SPV_START_BLOCK_HEIGHT = 199800;
+
+// estimate time: 2024-04-02 06:20:03
+// ref: https://mempool.space/block/0000000000000000000077d98a103858c7d7cbc5ba67a4135f348a436bec1748
+export const BTC_MAINNET_SPV_START_BLOCK_HEIGHT = 837300;
diff --git a/src/services/unlocker.ts b/src/services/unlocker.ts
index 623948c2..f8ffbc2b 100644
--- a/src/services/unlocker.ts
+++ b/src/services/unlocker.ts
@@ -17,7 +17,12 @@ import {
 import { btcTxIdFromBtcTimeLockArgs } from '@rgbpp-sdk/ckb/lib/utils/rgbpp';
 import { BtcAssetsApi } from '@rgbpp-sdk/service';
 import { Cradle } from '../container';
-import { TestnetTypeMap } from '../constants';
+import {
+  BTC_MAINNET_SPV_START_BLOCK_HEIGHT,
+  BTC_SIGNET_SPV_START_BLOCK_HEIGHT,
+  BTC_TESTNET_SPV_START_BLOCK_HEIGHT,
+  TestnetTypeMap,
+} from '../constants';
 
 interface IUnlocker {
   getNextBatchLockCell(): Promise<IndexerCell[]>;
@@ -54,6 +59,17 @@ export default class Unlocker implements IUnlocker {
     return getBtcTimeLockScript(this.isMainnet, this.testnetType);
   }
 
+  private get btcSpvStartBlockHeight() {
+    const network = this.cradle.env.NETWORK;
+    if (network === 'mainnet') {
+      return BTC_MAINNET_SPV_START_BLOCK_HEIGHT;
+    }
+    if (network === 'testnet') {
+      return BTC_TESTNET_SPV_START_BLOCK_HEIGHT;
+    }
+    return BTC_SIGNET_SPV_START_BLOCK_HEIGHT;
+  }
+
   /**
    * Get next batch of BTC time lock cells
    */
@@ -73,6 +89,11 @@ export default class Unlocker implements IUnlocker {
       const btcTx = await this.cradle.bitcoin.getTx({ txid: btcTxid });
       const blockHeight = btcTx.status.block_height;
 
+      // skip if the block height of the btc txid is less than the BTC SPV start block height
+      if (blockHeight && blockHeight < this.btcSpvStartBlockHeight) {
+        continue;
+      }
+
       // skip if btc tx not confirmed $after blocks yet
       if (!blockHeight || blocks - blockHeight < after) {
         continue;
diff --git a/test/services/unlocker.test.ts b/test/services/unlocker.test.ts
index 7512ca29..74a84ad9 100644
--- a/test/services/unlocker.test.ts
+++ b/test/services/unlocker.test.ts
@@ -75,9 +75,9 @@ describe('Unlocker', () => {
 
   test('getNextBatchLockCell: should skip unconfirmed btc tx', async () => {
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 100 });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 2685000 });
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 95 } });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 2684995 } });
     mockBtcTimeLockCell();
 
     const cells = await unlocker.getNextBatchLockCell();
@@ -86,9 +86,9 @@ describe('Unlocker', () => {
 
   test('getNextBatchLockCell: should return cells when btc tx is confirmed', async () => {
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 101 });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 2685001 });
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 95 } });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 2684995 } });
     mockBtcTimeLockCell();
 
     const cells = await unlocker.getNextBatchLockCell();
@@ -99,9 +99,9 @@ describe('Unlocker', () => {
     unlocker['cradle'].env.UNLOCKER_CELL_BATCH_SIZE = 1;
 
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 101 });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getBlockchainInfo').mockResolvedValue({ blocks: 2685001 });
     // @ts-expect-error
-    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 95 } });
+    vi.spyOn(unlocker['cradle'].bitcoin, 'getTx').mockResolvedValue({ status: { block_height: 2684995 } });
     mockBtcTimeLockCell();
 
     const cells = await unlocker.getNextBatchLockCell();