diff --git a/interfaces/storage.go b/interfaces/storage.go
index 095ceee..be15e65 100644
--- a/interfaces/storage.go
+++ b/interfaces/storage.go
@@ -5,4 +5,7 @@ import "io"
 type StorageService interface {
 	Init()
 	PutFile(file io.ReadSeeker, bucket string, generateProof bool) ([]byte, error)
+	CIDExists(cid interface {
+		ToString() (string, error)
+	}) bool
 }
diff --git a/storage/storage.go b/storage/storage.go
index 194ec8d..ec508a3 100644
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -3,6 +3,7 @@ package storage
 import (
 	"bytes"
 	"git.lumeweb.com/LumeWeb/libs5-go/encoding"
+	"git.lumeweb.com/LumeWeb/portal/db/models"
 	"git.lumeweb.com/LumeWeb/portal/interfaces"
 	"github.com/go-resty/resty/v2"
 	"go.uber.org/zap"
@@ -105,3 +106,17 @@ func (s *StorageServiceImpl) createBucketIfNotExists(bucket string) error {
 
 	return nil
 }
+
+func (s *StorageServiceImpl) CIDExists(cid interface {
+	ToString() (string, error)
+}) bool {
+	cidStr, err := cid.ToString()
+	if err != nil {
+		return false
+	}
+
+	var count int64
+	s.portal.Db().Model(&models.Upload{}).Where(&models.Upload{CID: cidStr}).Count(&count)
+
+	return count > 0
+}