diff --git a/open_prices/api/proofs/tests.py b/open_prices/api/proofs/tests.py
index 91256b43..a2ef9c82 100644
--- a/open_prices/api/proofs/tests.py
+++ b/open_prices/api/proofs/tests.py
@@ -69,30 +69,17 @@ def setUpTestData(cls):
 
     def test_proof_list(self):
         # anonymous
-        response = self.client.get(self.url)
-        self.assertEqual(response.status_code, 403)
-        # wrong token
-        response = self.client.get(
-            self.url, headers={"Authorization": f"Bearer {self.user_session.token}X"}
-        )
-        self.assertEqual(response.status_code, 403)
-        # authenticated
-        # thanks to select_related and prefetch_related, we only have 6
+        # thanks to select_related and prefetch_related, we only have 3
         # queries:
-        # - 1 to get the fetch the user session
-        # - 1 to update the session
-        # - 1 to get the user
         # - 1 to count the number of proofs of the user
         # - 1 to get the proofs and their associated locations (select_related)
         # - 1 to get the associated proof predictions (prefetch_related)
-        with self.assertNumQueries(6):
-            response = self.client.get(
-                self.url, headers={"Authorization": f"Bearer {self.user_session.token}"}
-            )
+        with self.assertNumQueries(3):
+            response = self.client.get(self.url)
             self.assertEqual(response.status_code, 200)
             data = response.data
-            self.assertEqual(data["total"], 2)  # only user's proofs
-            self.assertEqual(len(data["items"]), 2)
+            self.assertEqual(data["total"], 3)
+            self.assertEqual(len(data["items"]), 3)
             item = data["items"][0]
             self.assertEqual(item["id"], self.proof.id)  # default order
             self.assertIn("predictions", item)
@@ -122,10 +109,8 @@ def setUpTestData(cls):
 
     def test_proof_list_order_by(self):
         url = self.url + "?order_by=-price_count"
-        response = self.client.get(
-            url, headers={"Authorization": f"Bearer {self.user_session.token}"}
-        )
-        self.assertEqual(response.data["total"], 2)
+        response = self.client.get(url)
+        self.assertEqual(response.data["total"], 3)
         self.assertEqual(response.data["items"][0]["price_count"], 50)
 
 
@@ -146,12 +131,16 @@ def setUpTestData(cls):
 
     def test_proof_list_filter_by_type(self):
         url = self.url + "?type=RECEIPT"
-        response = self.client.get(
-            url, headers={"Authorization": f"Bearer {self.user_session.token}"}
-        )
+        response = self.client.get(url)
         self.assertEqual(response.data["total"], 1)
         self.assertEqual(response.data["items"][0]["price_count"], 15)
 
+    def test_proof_list_filter_by_owner(self):
+        url = self.url + f"?owner={self.user_session.user.user_id}"
+        response = self.client.get(url)
+        self.assertEqual(response.data["total"], 2)
+        self.assertEqual(response.data["items"][0]["price_count"], 15)
+
 
 class ProofDetailApiTest(TestCase):
     @classmethod
@@ -166,23 +155,11 @@ def setUpTestData(cls):
     def test_proof_detail(self):
         # 404
         url = reverse("api:proofs-detail", args=[999])
-        response = self.client.get(
-            url, headers={"Authorization": f"Bearer {self.user_session_1.token}"}
-        )
+        response = self.client.get(url)
         self.assertEqual(response.status_code, 404)
         self.assertEqual(response.data["detail"], "No Proof matches the given query.")
         # anonymous
         response = self.client.get(self.url)
-        self.assertEqual(response.status_code, 403)
-        # wrong token
-        response = self.client.get(
-            self.url, headers={"Authorization": f"Bearer {self.user_session_1.token}X"}
-        )
-        self.assertEqual(response.status_code, 403)
-        # authenticated
-        response = self.client.get(
-            self.url, headers={"Authorization": f"Bearer {self.user_session_1.token}"}
-        )
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data["id"], self.proof.id)
 
diff --git a/open_prices/api/proofs/views.py b/open_prices/api/proofs/views.py
index 35eeff34..6cbb33b5 100644
--- a/open_prices/api/proofs/views.py
+++ b/open_prices/api/proofs/views.py
@@ -4,7 +4,7 @@
 from rest_framework import filters, mixins, status, viewsets
 from rest_framework.decorators import action
 from rest_framework.parsers import MultiPartParser
-from rest_framework.permissions import IsAuthenticated
+from rest_framework.permissions import IsAuthenticatedOrReadOnly
 from rest_framework.request import Request
 from rest_framework.response import Response
 
@@ -31,9 +31,9 @@ class ProofViewSet(
     viewsets.GenericViewSet,
 ):
     authentication_classes = [CustomAuthentication]
-    permission_classes = [IsAuthenticated]
+    permission_classes = [IsAuthenticatedOrReadOnly]
     http_method_names = ["get", "post", "patch", "delete"]  # disable "put"
-    queryset = Proof.objects.none()
+    queryset = Proof.objects.all()
     serializer_class = ProofFullSerializer
     filter_backends = [DjangoFilterBackend, filters.OrderingFilter]
     filterset_class = ProofFilter
@@ -41,18 +41,18 @@ class ProofViewSet(
     ordering = ["created"]
 
     def get_queryset(self):
-        # only return proofs owned by the current user
-        if self.request.user.is_authenticated:
-            queryset = Proof.objects.filter(owner=self.request.user.user_id)
-            if self.request.method in ["GET"]:
-                # Select all proofs along with their locations using a select
-                # related query (1 single query)
-                # Then prefetch all the predictions related to the proof using
-                # a prefetch related query (only 1 query for all proofs)
-                return queryset.select_related("location").prefetch_related(
-                    "predictions"
-                )
-            return queryset
+        if self.request.method in ["GET"]:
+            # Select all proofs along with their locations using a select
+            # related query (1 single query)
+            # Then prefetch all the predictions related to the proof using
+            # a prefetch related query (only 1 query for all proofs)
+            return self.queryset.select_related("location").prefetch_related(
+                "predictions"
+            )
+        elif self.request.method in ["PATCH", "DELETE"]:
+            # only return proofs owned by the current user
+            if self.request.user.is_authenticated:
+                return self.queryset.filter(owner=self.request.user.user_id)
         return self.queryset
 
     def get_serializer_class(self):