diff --git a/src/main/java/entity/SeedHash.java b/src/main/java/entity/SeedHash.java
new file mode 100644
index 0000000..0ca07ab
--- /dev/null
+++ b/src/main/java/entity/SeedHash.java
@@ -0,0 +1,19 @@
+package entity;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "SeedHash")
+public class SeedHash {
+    @Id
+    @Column(name = "seed_id", length = 64)
+    public String seedId;
+
+    @Column(name = "info_hash", length = 40, nullable = false)
+    public String infoHash;
+
+    // optional back‐ref
+    @ManyToOne
+    @JoinColumn(name = "seed_id", insertable = false, updatable = false)
+    public Seed seed;
+}