diff --git a/picard/acoustid/json_helpers.py b/picard/acoustid/json_helpers.py
index e56bf160a..354f76f87 100644
--- a/picard/acoustid/json_helpers.py
+++ b/picard/acoustid/json_helpers.py
@@ -67,16 +67,22 @@ def _make_artist_credit_node(artists):
 
 
 def parse_recording(recording):
-    if 'title' not in recording:  # we have no metadata for this recording
+    if 'id' not in recording:  # we have no metadata for this recording
         return
 
     recording_mb = {
-        'id': recording['id'],
-        'title': recording['title'],
-        'artist-credit': _make_artist_credit_node(recording['artists']),
-        'releases': _make_releases_node(recording)
+        'id': recording['id']
     }
 
+    if 'title' in recording:
+        recording_mb['title'] = recording['title']
+
+    if 'artists' in recording:
+        recording_mb['artist-credit'] = _make_artist_credit_node(recording['artists'])
+
+    if 'releasegroups' in recording:
+        recording_mb['releases'] = _make_releases_node(recording)
+
     if 'duration' in recording:
         try:
             recording_mb['length'] = int(recording['duration']) * 1000
diff --git a/picard/file.py b/picard/file.py
index 05cfb0013..02fd31aa5 100644
--- a/picard/file.py
+++ b/picard/file.py
@@ -634,7 +634,8 @@ class File(QtCore.QObject, Item):
             self.tagger.get_release_group_by_id(rg['id']).loaded_albums.add(release['id'])
             self.tagger.move_file_to_track(self, release['id'], track['id'])
         else:
-            self.tagger.move_file_to_nat(self, track['id'], node=track)
+            node = track if 'title' in track else None
+            self.tagger.move_file_to_nat(self, track['id'], node=node)
 
     def lookup_metadata(self):
         """Try to identify the file using the existing metadata."""
diff --git a/picard/metadata.py b/picard/metadata.py
index 5958967ca..37d1c57af 100644
--- a/picard/metadata.py
+++ b/picard/metadata.py
@@ -222,12 +222,13 @@ class Metadata(dict):
 
         if 'title' in self:
             a = self['title']
-            b = track['title']
+            b = track.get('title', '')
             parts.append((similarity2(a, b), weights["title"]))
 
         if 'artist' in self:
             a = self['artist']
-            b = artist_credit_from_node(track['artist-credit'])[0]
+            artist_credits = track.get('artist-credit', [])
+            b = artist_credit_from_node(artist_credits)[0]
             parts.append((similarity2(a, b), weights["artist"]))
 
         a = self.length