diff --git a/src/main/java/ru/soune/nocopy/controller/ApiController.java b/src/main/java/ru/soune/nocopy/controller/ApiController.java
index 529f163..ad12fce 100644
--- a/src/main/java/ru/soune/nocopy/controller/ApiController.java
+++ b/src/main/java/ru/soune/nocopy/controller/ApiController.java
@@ -2,6 +2,7 @@ package ru.soune.nocopy.controller;
 
 import com.vrt.NoCopyFileService;
 import com.vrt.fileprotection.FileProtector;
+import com.vrt.fileprotection.NoCopyCheckResult;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.core.io.Resource;
@@ -38,6 +39,7 @@ import ru.soune.nocopy.service.file.FileEntityService;
 import ru.soune.nocopy.service.file.FileUploadService;
 import ru.soune.nocopy.util.FileUtil;
 
+import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -380,6 +382,25 @@ public class ApiController {
         return ResponseEntity.ok().build();
     }
 
+    @GetMapping("/check/{fileId}/{type}")
+    public ResponseEntity<?> check(@PathVariable(required = false) String fileId,
+                                   @PathVariable(required = false) String type) {
+        Optional<FileEntity> optionalFileEntity = fileEntityRepository.findById(fileId);
+        if (!optionalFileEntity.isPresent()) {
+            return ResponseEntity.notFound().build();
+        }
+
+        FileEntity fileEntity = optionalFileEntity.get();
+
+        Path path = Paths.get(fileEntity.getFilePath());
+        File file = path.toFile();
+
+        NoCopyCheckResult noCopyCheckResult = noCopyFileService.checkFile(file,
+                FileProtector.Type.valueOf(type.toUpperCase()));
+
+        return ResponseEntity.ok().body(noCopyCheckResult);
+    }
+
     private ResponseEntity<BaseResponse> checkForDuplicates(String uploadId) throws IOException {
         Optional<FileEntity> uploadedFile = fileEntityRepository.findByUploadSessionId(uploadId);
 
diff --git a/src/main/java/ru/soune/nocopy/entity/file/ImageHashEntity.java b/src/main/java/ru/soune/nocopy/entity/file/ImageHashEntity.java
index 37f1b5a..f18a572 100644
--- a/src/main/java/ru/soune/nocopy/entity/file/ImageHashEntity.java
+++ b/src/main/java/ru/soune/nocopy/entity/file/ImageHashEntity.java
@@ -26,10 +26,10 @@ public class ImageHashEntity {
     private FileEntity file;
 
     @Column(name = "hash64_hi")
-    private Integer hash64Hi;
+    private Long hash64Hi;
 
     @Column(name = "hash64_lo")
-    private Integer hash64Lo;
+    private Long hash64Lo;
 
     @Column(name = "hash_algorithm", nullable = false)
     private String hashAlgorithm;
diff --git a/src/main/java/ru/soune/nocopy/repository/ImageHashRepository.java b/src/main/java/ru/soune/nocopy/repository/ImageHashRepository.java
index c0d8d7f..48b4378 100644
--- a/src/main/java/ru/soune/nocopy/repository/ImageHashRepository.java
+++ b/src/main/java/ru/soune/nocopy/repository/ImageHashRepository.java
@@ -10,5 +10,5 @@ import java.util.List;
 public interface ImageHashRepository extends JpaRepository<ImageHashEntity, String> {
     void deleteByFileId(String fileId);
     List<ImageHashEntity> findByFileId(String fileId);
-    ImageHashEntity findByHash64HiAndHash64Lo(Integer hash64Hi, Integer hash64Lo);
+    ImageHashEntity findByHash64HiAndHash64Lo(Long hash64Hi, Long hash64Lo);
 }
diff --git a/src/main/java/ru/soune/nocopy/repository/ImageSimilarityRepository.java b/src/main/java/ru/soune/nocopy/repository/ImageSimilarityRepository.java
index a6ef973..cd57871 100644
--- a/src/main/java/ru/soune/nocopy/repository/ImageSimilarityRepository.java
+++ b/src/main/java/ru/soune/nocopy/repository/ImageSimilarityRepository.java
@@ -48,7 +48,7 @@ public interface ImageSimilarityRepository
     """,
             nativeQuery = true)
     List<SimilarImageProjection> findExactDuplicates(
-            @Param("hash64Hi") Integer hash64_hi,
-            @Param("hash64Lo") Integer hash64_lo);
+            @Param("hash64Hi") Long hash64_hi,
+            @Param("hash64Lo") Long hash64_lo);
 }
 
diff --git a/src/main/java/ru/soune/nocopy/repository/SimilarImageProjection.java b/src/main/java/ru/soune/nocopy/repository/SimilarImageProjection.java
index ed2fdb4..c098789 100644
--- a/src/main/java/ru/soune/nocopy/repository/SimilarImageProjection.java
+++ b/src/main/java/ru/soune/nocopy/repository/SimilarImageProjection.java
@@ -1,8 +1,8 @@
 package ru.soune.nocopy.repository;
 
 public interface SimilarImageProjection {
-    Integer getHash64Hi();
-    Integer getHash64Lo();
+    Long getHash64Hi();
+    Long getHash64Lo();
     String getFileId();
     Long getUserId();
     String getOriginalFileName();
diff --git a/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java b/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
index 51f1808..0b6a7d9 100644
--- a/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
+++ b/src/main/java/ru/soune/nocopy/service/FileSimilarityService.java
@@ -32,15 +32,15 @@ public class FileSimilarityService {
         var imageHashEntity = hashRepository.findById(fileId)
                 .orElseThrow(() -> new RuntimeException("Hash not found"));
 
-        Integer hash64Hi = imageHashEntity.getHash64Hi();
-        Integer hash64Lo = imageHashEntity.getHash64Lo();
+        Long hash64Hi = imageHashEntity.getHash64Hi();
+        Long hash64Lo = imageHashEntity.getHash64Lo();
 
         List<SimilarImageProjection> candidates = repository.findCandidates(fileId);
 
         return candidates.stream()
                 .map(c -> {
-                    Integer cHi = c.getHash64Hi();
-                    Integer cLo = c.getHash64Lo();
+                    Long cHi = c.getHash64Hi();
+                    Long cLo = c.getHash64Lo();
 
                     int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, cHi, cLo);
 
@@ -73,13 +73,13 @@ public class FileSimilarityService {
         var imageHashEntity = hashRepository.findById(fileId)
                 .orElseThrow(() -> new RuntimeException("Hash not found"));
 
-        Integer hash64Hi = imageHashEntity.getHash64Hi();
-        Integer hash64Lo = imageHashEntity.getHash64Lo();
+        Long hash64Hi = imageHashEntity.getHash64Hi();
+        Long hash64Lo = imageHashEntity.getHash64Lo();
 
         return candidates.stream()
                 .map(c -> {
-                    Integer cHi = c.getHash64Hi();
-                    Integer cLo = c.getHash64Lo();
+                    Long cHi = c.getHash64Hi();
+                    Long cLo = c.getHash64Lo();
 
                     int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, cHi, cLo);
 
@@ -112,7 +112,7 @@ public class FileSimilarityService {
                 .toList();
     }
 
-    public List<SimilarImageProjection> findDuplicatedByHash(Integer hash64Hi, Integer hash64Lo) {
+    public List<SimilarImageProjection> findDuplicatedByHash(Long hash64Hi, Long hash64Lo) {
         List<SimilarImageProjection> duplicates = repository.findExactDuplicates(hash64Hi,hash64Lo);
 
         if (duplicates.isEmpty()) {
@@ -126,8 +126,8 @@ public class FileSimilarityService {
         var imageHashEntity = hashRepository.findById(fileId)
                 .orElseThrow(() -> new RuntimeException("Hash not found"));
 
-        Integer hash64Hi = imageHashEntity.getHash64Hi();
-        Integer hash64Lo = imageHashEntity.getHash64Lo();
+        Long hash64Hi = imageHashEntity.getHash64Hi();
+        Long hash64Lo = imageHashEntity.getHash64Lo();
 
         List<SimilarImageProjection> candidates = repository.findCandidates(fileId);
 
@@ -154,9 +154,9 @@ public class FileSimilarityService {
     }
 
     private SimilarFileDTO createSimilarFileResponse(SimilarImageProjection similarImageProjection,
-                                                     Integer hash64Hi, Integer hash64Lo) {
-        Integer imageProjectionHash64Hi = similarImageProjection.getHash64Hi();
-        Integer similarImageProjectionHash64Lo = similarImageProjection.getHash64Lo();
+                                                     Long hash64Hi, Long hash64Lo) {
+        Long imageProjectionHash64Hi = similarImageProjection.getHash64Hi();
+        Long similarImageProjectionHash64Lo = similarImageProjection.getHash64Lo();
 
         int hamming = fileUtil.hamming64(hash64Hi, hash64Lo, imageProjectionHash64Hi, similarImageProjectionHash64Lo);
 
diff --git a/src/main/java/ru/soune/nocopy/service/ImageHashService.java b/src/main/java/ru/soune/nocopy/service/ImageHashService.java
index 7df67bc..672bf78 100644
--- a/src/main/java/ru/soune/nocopy/service/ImageHashService.java
+++ b/src/main/java/ru/soune/nocopy/service/ImageHashService.java
@@ -22,19 +22,19 @@ public class ImageHashService {
 
     private final ImageHashRepository repository;
 
-    public Map<String, Integer> calculateHash(Path imagePath) throws IOException {
+    public Map<String, Long> calculateHash(Path imagePath) throws IOException {
         File file = imagePath.toFile();
         PHash pHash = PerceptualHashHelper.INSTANCE.generateDCTPerceptualHash(file);
         Long firstPart = pHash.getFirstPart();
         Long secondPart = pHash.getSecondPart();
-        Map<String, Integer> hash = Map.of(
-                "hi", Math.toIntExact(firstPart),
-                "low", Math.toIntExact(secondPart));
+        Map<String, Long> hash = Map.of(
+                "hi", firstPart,
+                "low", secondPart);
 
         return hash;
     }
 
-    public void create(FileEntity file,  Map<String, Integer> stringIntegerMap) {
+    public void create(FileEntity file,  Map<String, Long> stringIntegerMap) {
         ImageHashEntity entity = ImageHashEntity.builder()
                 .file(file)
                 .hash64Hi(stringIntegerMap.get("hi"))
diff --git a/src/main/java/ru/soune/nocopy/service/file/FileEntityService.java b/src/main/java/ru/soune/nocopy/service/file/FileEntityService.java
index 4522691..1970cb2 100644
--- a/src/main/java/ru/soune/nocopy/service/file/FileEntityService.java
+++ b/src/main/java/ru/soune/nocopy/service/file/FileEntityService.java
@@ -49,7 +49,7 @@ public class FileEntityService {
                 throw new IOException("File not found on disk: " + filePath);
             }
 
-            Map<String, Integer> imageHash = Map.of();
+            Map<String, Long> imageHash = Map.of();
 
             if (session.getFileType().startsWith("image")) {
                 imageHash = imageHashService.calculateHash(filePath);
diff --git a/src/main/java/ru/soune/nocopy/service/file/impl/FileUploadServiceImpl.java b/src/main/java/ru/soune/nocopy/service/file/impl/FileUploadServiceImpl.java
index cb4fa3b..1daadda 100644
--- a/src/main/java/ru/soune/nocopy/service/file/impl/FileUploadServiceImpl.java
+++ b/src/main/java/ru/soune/nocopy/service/file/impl/FileUploadServiceImpl.java
@@ -283,12 +283,16 @@ public class FileUploadServiceImpl implements FileUploadService {
 
             FileEntity saved = fileEntityRepository.save(fileEntity);
 
-            Map<String, Integer> hash = imageHashService.calculateHash(filePath);
+            if (session.getFileType().equals("image")) {
+                Map<String, Long> hash = imageHashService.calculateHash(filePath);
 
-            imageHashService.create(saved, hash);
+                imageHashService.create(saved, hash);
+            }
 
             cleanupSessionFiles(session);
 
+            noCopyFileService.addFile(fileUtil.createFileInfo(fileEntity));
+
             log.info("File processing completed for session: {}", session.getUploadId());
 
         } catch (Exception e) {
@@ -380,7 +384,8 @@ public class FileUploadServiceImpl implements FileUploadService {
     private void checkForDuplicatesSynchronously(String filePath)
             throws IOException {
         Path path = Paths.get(filePath);
-        Map<String, Integer> hash = imageHashService.calculateHash(path);
+        Map<String, Long> hash = imageHashService.calculateHash(path);
+
         List<SimilarImageProjection> duplicates = fileSimilarityService.findDuplicatedByHash(
                 hash.get("hi"), hash.get("low"));
 
diff --git a/src/main/java/ru/soune/nocopy/service/file/impl/ImageLocalSearchImpl.java b/src/main/java/ru/soune/nocopy/service/file/impl/ImageLocalSearchImpl.java
index 1ecf8c7..79b8963 100644
--- a/src/main/java/ru/soune/nocopy/service/file/impl/ImageLocalSearchImpl.java
+++ b/src/main/java/ru/soune/nocopy/service/file/impl/ImageLocalSearchImpl.java
@@ -44,8 +44,8 @@ public class ImageLocalSearchImpl implements ImageLocalSearch {
     @Override
     public @Nullable FileProtector.FileInfo findByPHash(@NotNull PHash pHash) {
         ImageHashEntity imageHashEntity =
-                imageHashRepository.findByHash64HiAndHash64Lo(Math.toIntExact(pHash.getFirstPart()),
-                        Math.toIntExact(pHash.getSecondPart()));
+                imageHashRepository.findByHash64HiAndHash64Lo(pHash.getFirstPart(),
+                        pHash.getSecondPart());
         FileEntity file = fileEntityRepository.findByFileId(imageHashEntity.getFileId());
 
         return new FileProtector.FileInfo(FileProtector.Type.IMAGE, imageHashEntity.getFileId(),
diff --git a/src/main/java/ru/soune/nocopy/service/file/impl/ProtectionFileProviderImpl.java b/src/main/java/ru/soune/nocopy/service/file/impl/ProtectionFileProviderImpl.java
index 62c9aa1..57323a0 100644
--- a/src/main/java/ru/soune/nocopy/service/file/impl/ProtectionFileProviderImpl.java
+++ b/src/main/java/ru/soune/nocopy/service/file/impl/ProtectionFileProviderImpl.java
@@ -10,12 +10,18 @@ import org.springframework.stereotype.Component;
 import ru.soune.nocopy.service.file.FileEntityService;
 
 import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 
 @Slf4j
 @Component
 @RequiredArgsConstructor
 public class ProtectionFileProviderImpl implements FileProtector.FileProvider {
 
+    private static final Path SIGNATURE_FILE_PATH = Paths.get("/data/uploads/signature");
+
     private final FileEntityService fileEntityService;
 
     @Nullable
@@ -38,9 +44,41 @@ public class ProtectionFileProviderImpl implements FileProtector.FileProvider {
 
     @Override
     public @Nullable File getSignature() {
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! GET SIGNATURE FILE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        File signatureFile = SIGNATURE_FILE_PATH.toFile();
+
+        if (signatureFile.exists() && signatureFile.isFile() && signatureFile.length() > 0) {
+            return signatureFile;
+        }
+
         return null;
     }
 
+    @Override
+    public @NotNull OperationResult writeSignature(@NotNull byte[] bytes) {
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        log.info(" !!!!!!!!!!!!!!!!!!!!!!!!!!! WRITING SIGNATURE FILE  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+        try {
+            Path directory = SIGNATURE_FILE_PATH.getParent();
+
+            if (directory != null && !Files.exists(directory)) {
+                Files.createDirectories(directory);
+            }
+
+            Files.write(SIGNATURE_FILE_PATH, bytes);
+
+            return OperationResult.Companion.success();
+        } catch (IOException e) {
+            return OperationResult.Companion.failure("Not saved signature file");
+        }
+    }
+
     @NotNull
     @Override
     public com.vrt.fileprotection.OperationResult writeAudioFile(@NotNull String id, @NotNull byte[] data, @Nullable String fileExt) {
@@ -76,9 +114,4 @@ public class ProtectionFileProviderImpl implements FileProtector.FileProvider {
             return OperationResult.Companion.failure("Failed to create protected file");
         }
     }
-
-    @Override
-    public @NotNull OperationResult writeSignature(@NotNull byte[] bytes) {
-        return null;
-    }
 }
diff --git a/src/main/java/ru/soune/nocopy/util/FileUtil.java b/src/main/java/ru/soune/nocopy/util/FileUtil.java
index bad535d..192e1d3 100644
--- a/src/main/java/ru/soune/nocopy/util/FileUtil.java
+++ b/src/main/java/ru/soune/nocopy/util/FileUtil.java
@@ -25,9 +25,9 @@ public class FileUtil {
         return new FileProtector.FileInfo(type, fileEntity.getId(), String.valueOf(fileEntity.getUserId()));
     }
 
-    public int hamming64(int aHi, int aLo, int bHi, int bLo) {
-        return Integer.bitCount(aHi ^ bHi)
-                + Integer.bitCount(aLo ^ bLo);
+    public int hamming64(long aHi, long aLo, long bHi, long bLo) {
+        return Long.bitCount(aHi ^ bHi)
+                + Long.bitCount(aLo ^ bLo);
     }
 
     private FileProtector.Type determineFileType(String mimeType) {