diff --git a/.changeset/ninety-geckos-yawn.md b/.changeset/ninety-geckos-yawn.md
new file mode 100644
index 00000000..d98dab79
--- /dev/null
+++ b/.changeset/ninety-geckos-yawn.md
@@ -0,0 +1,8 @@
+---
+'@api3/contracts': patch
+---
+
+Update block explorer URLs and verification API types for following testnets:
+
+- katana-sepolia-testnet
+- taiko-hoodi-testnet
diff --git a/data/chains/katana-sepolia-testnet.json b/data/chains/katana-sepolia-testnet.json
index 55fa28f4..f5bf79d6 100644
--- a/data/chains/katana-sepolia-testnet.json
+++ b/data/chains/katana-sepolia-testnet.json
@@ -1,6 +1,6 @@
 {
   "alias": "katana-sepolia-testnet",
-  "blockExplorerUrl": "https://explorer-bokuto.katanarpc.com/",
+  "blockExplorerUrl": "https://bokuto.katanascan.com/",
   "decimals": 18,
   "id": "737373",
   "name": "Katana testnet",
@@ -13,7 +13,6 @@
   "symbol": "ETH",
   "testnet": true,
   "verificationApi": {
-    "type": "blockscout",
-    "url": "https://explorer-bokuto.katanarpc.com/api"
+    "type": "etherscan"
   }
 }
diff --git a/data/chains/taiko-hoodi-testnet.json b/data/chains/taiko-hoodi-testnet.json
index a6779abf..1bfc5efc 100644
--- a/data/chains/taiko-hoodi-testnet.json
+++ b/data/chains/taiko-hoodi-testnet.json
@@ -1,6 +1,6 @@
 {
   "alias": "taiko-hoodi-testnet",
-  "blockExplorerUrl": "https://blockscout.hoodi.taiko.xyz/",
+  "blockExplorerUrl": "https://hoodi.taikoscan.io/",
   "decimals": 18,
   "id": "167012",
   "name": "Taiko Hoodi testnet",
@@ -13,7 +13,6 @@
   "symbol": "ETH",
   "testnet": true,
   "verificationApi": {
-    "type": "blockscout",
-    "url": "https://blockscoutapi.hoodi.taiko.xyz/api?module=contract&action=verify"
+    "type": "etherscan"
   }
 }
diff --git a/src/generated/chains.ts b/src/generated/chains.ts
index 9f57e05d..a4051028 100644
--- a/src/generated/chains.ts
+++ b/src/generated/chains.ts
@@ -465,14 +465,14 @@ export const CHAINS: Chain[] = [
   },
   {
     alias: 'katana-sepolia-testnet',
-    blockExplorerUrl: 'https://explorer-bokuto.katanarpc.com/',
+    blockExplorerUrl: 'https://bokuto.katanascan.com/',
     decimals: 18,
     id: '737373',
     name: 'Katana testnet',
     providers: [{ alias: 'default', rpcUrl: 'https://rpc-bokuto.katanarpc.com/' }],
     symbol: 'ETH',
     testnet: true,
-    verificationApi: { type: 'blockscout', url: 'https://explorer-bokuto.katanarpc.com/api' },
+    verificationApi: { type: 'etherscan' },
   },
   {
     alias: 'katana',
@@ -1030,17 +1030,14 @@ export const CHAINS: Chain[] = [
   },
   {
     alias: 'taiko-hoodi-testnet',
-    blockExplorerUrl: 'https://blockscout.hoodi.taiko.xyz/',
+    blockExplorerUrl: 'https://hoodi.taikoscan.io/',
     decimals: 18,
     id: '167012',
     name: 'Taiko Hoodi testnet',
     providers: [{ alias: 'default', rpcUrl: 'https://rpc.hoodi.taiko.xyz' }],
     symbol: 'ETH',
     testnet: true,
-    verificationApi: {
-      type: 'blockscout',
-      url: 'https://blockscoutapi.hoodi.taiko.xyz/api?module=contract&action=verify',
-    },
+    verificationApi: { type: 'etherscan' },
   },
   {
     alias: 'taiko',