diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a3fef2c90..304604deb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 
 - [#6912](https://github.com/blockscout/blockscout/pull/6912) - Docker compose fix exposed ports
 - [#6833](https://github.com/blockscout/blockscout/pull/6833) - Fix an error occurred when decoding base64 encoded json
+- [#6911](https://github.com/blockscout/blockscout/pull/6911) - Fix bugs in verification API v2
 - [#6891](https://github.com/blockscout/blockscout/pull/6891) - Fix read contract for geth
 - [#6889](https://github.com/blockscout/blockscout/pull/6889) - Fix Internal Server Error on tx input decoding
 - [#6893](https://github.com/blockscout/blockscout/pull/6893) - Fix token type definition for multiple interface tokens
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/verification_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/verification_controller.ex
index 380d3dc2a7..8ac0bf29cf 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/verification_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/verification_controller.ex
@@ -113,7 +113,10 @@ defmodule BlockScoutWeb.API.V2.VerificationController do
          files_content <- PublishHelper.read_files(files_array) do
       chosen_contract = params["chosen_contract_index"]
 
-      Que.add(SolidityPublisherWorker, {"sourcify_api_v2", address_hash_string, files_content, conn, chosen_contract})
+      Que.add(
+        SolidityPublisherWorker,
+        {"sourcify_api_v2", String.downcase(address_hash_string), files_content, conn, chosen_contract}
+      )
 
       conn
       |> put_view(ApiView)
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/api/v2/verification_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/api/v2/verification_controller_test.exs
index 9ae14d31eb..cca0314023 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/api/v2/verification_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/api/v2/verification_controller_test.exs
@@ -183,7 +183,7 @@ defmodule BlockScoutWeb.API.V2.VerificationControllerTest do
 
       _contract = insert(:address, hash: address, contract_code: "0x01")
 
-      topic = "addresses:#{address}"
+      topic = "addresses:#{String.downcase(address)}"
 
       {:ok, _reply, _socket} =
         UserSocketV2
diff --git a/apps/explorer/lib/explorer/smart_contract/solidity/publish_helper.ex b/apps/explorer/lib/explorer/smart_contract/solidity/publish_helper.ex
index 99784864d8..eb34687e53 100644
--- a/apps/explorer/lib/explorer/smart_contract/solidity/publish_helper.ex
+++ b/apps/explorer/lib/explorer/smart_contract/solidity/publish_helper.ex
@@ -94,15 +94,29 @@ defmodule Explorer.SmartContract.Solidity.PublishHelper do
 
   def get_one_json(files_array) do
     files_array
-    |> Enum.filter(fn file -> file.content_type == "application/json" end)
+    |> Enum.filter(fn file ->
+      case file do
+        %Plug.Upload{content_type: content_type} ->
+          content_type == "application/json"
+
+        _ ->
+          false
+      end
+    end)
     |> Enum.at(0)
   end
 
   # sobelow_skip ["Traversal.FileModule"]
   def read_files(plug_uploads) do
-    Enum.reduce(plug_uploads, %{}, fn %Plug.Upload{path: path, filename: file_name}, acc ->
-      {:ok, file_content} = File.read(path)
-      Map.put(acc, file_name, file_content)
+    Enum.reduce(plug_uploads, %{}, fn file, acc ->
+      case file do
+        %Plug.Upload{path: path, filename: file_name} ->
+          {:ok, file_content} = File.read(path)
+          Map.put(acc, file_name, file_content)
+
+        _ ->
+          acc
+      end
     end)
   end