diff --git a/database/music_database.py b/database/music_database.py
index 930ea223..5abcd165 100644
--- a/database/music_database.py
+++ b/database/music_database.py
@@ -509,7 +509,7 @@ class MusicDatabase:
             if 'download_source' not in lh_cols:
                 cursor.execute("ALTER TABLE library_history ADD COLUMN download_source TEXT")
                 logger.info("Added download_source column to library_history")
-            for _col in ['source_track_id', 'source_track_title', 'source_filename', 'acoustid_result']:
+            for _col in ['source_track_id', 'source_track_title', 'source_filename', 'acoustid_result', 'source_artist']:
                 if _col not in lh_cols:
                     cursor.execute(f"ALTER TABLE library_history ADD COLUMN {_col} TEXT")
                     logger.info(f"Added {_col} column to library_history")
@@ -9622,7 +9622,7 @@ class MusicDatabase:
     def add_library_history_entry(self, event_type, title, artist_name=None, album_name=None,
                                   quality=None, server_source=None, file_path=None, thumb_url=None,
                                   download_source=None, source_track_id=None, source_track_title=None,
-                                  source_filename=None, acoustid_result=None):
+                                  source_filename=None, acoustid_result=None, source_artist=None):
         """Record a download or import event to the library history table."""
         try:
             conn = self._get_connection()
@@ -9630,10 +9630,12 @@ class MusicDatabase:
             cursor.execute("""
                 INSERT INTO library_history (event_type, title, artist_name, album_name,
                                              quality, server_source, file_path, thumb_url, download_source,
-                                             source_track_id, source_track_title, source_filename, acoustid_result)
-                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                                             source_track_id, source_track_title, source_filename,
+                                             acoustid_result, source_artist)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
             """, (event_type, title, artist_name, album_name, quality, server_source, file_path, thumb_url,
-                  download_source, source_track_id, source_track_title, source_filename, acoustid_result))
+                  download_source, source_track_id, source_track_title, source_filename,
+                  acoustid_result, source_artist))
             conn.commit()
             return True
         except Exception as e:
diff --git a/web_server.py b/web_server.py
index f780e6d5..6b6f0efb 100644
--- a/web_server.py
+++ b/web_server.py
@@ -1916,9 +1916,18 @@ def _record_library_history_download(context):
         source_track_id = (search_result.get('track_id', '')
                            or search_result.get('id', '')
                            or ti.get('id', ''))
-        # Source track title: only save if it differs from expected title (otherwise it's just noise)
-        _src_title = search_result.get('title', '') or search_result.get('name', '')
-        source_track_title = _src_title if _src_title and _src_title != title else ''
+
+        # Source title/artist — what the download source said the track was.
+        # For Soulseek: parsed from the peer's filename by TrackResult._parse_filename_metadata()
+        # For Tidal/YouTube/Qobuz: from the streaming API's own metadata
+        # These live on the candidate's original fields, NOT the spotify_clean_* fields
+        source_track_title = search_result.get('title', '') or search_result.get('name', '')
+        source_artist = search_result.get('artist', '')
+        # For streaming sources, track ID is encoded in filename as "id||display_name"
+        if source_filename and '||' in source_filename and username in ('tidal', 'youtube', 'qobuz', 'hifi', 'deezer_dl'):
+            _stream_id = source_filename.split('||')[0]
+            if _stream_id and not source_track_id:
+                source_track_id = _stream_id
 
         # AcoustID verification result
         acoustid_result = context.get('_acoustid_result', '')
@@ -1936,7 +1945,8 @@ def _record_library_history_download(context):
             source_track_id=source_track_id,
             source_track_title=source_track_title,
             source_filename=source_filename,
-            acoustid_result=acoustid_result
+            acoustid_result=acoustid_result,
+            source_artist=source_artist
         )
     except Exception:
         pass  # Non-critical, never block download flow
diff --git a/webui/static/script.js b/webui/static/script.js
index 784d03c1..fdd17bc4 100644
--- a/webui/static/script.js
+++ b/webui/static/script.js
@@ -21093,25 +21093,55 @@ function renderHistoryEntry(entry) {
 
     const meta = [entry.artist_name, entry.album_name].filter(Boolean).join(' — ');
 
-    // Source provenance detail line
+    // Source provenance — expected vs downloaded
     let sourceDetail = '';
-    if (entry.event_type === 'download' && (entry.source_filename || entry.source_track_title)) {
-        const parts = [];
-        if (entry.source_filename) parts.push(`File: ${escapeHtml(entry.source_filename)}`);
-        else if (entry.source_track_title) parts.push(`Source track: ${escapeHtml(entry.source_track_title)}`);
-        if (entry.source_track_id) parts.push(`ID: ${escapeHtml(entry.source_track_id)}`);
-        sourceDetail = `<div class="library-history-entry-source">${parts.join(' · ')}</div>`;
+    if (entry.event_type === 'download') {
+        const lines = [];
+        // Expected line (what we asked for)
+        if (entry.title || entry.artist_name) {
+            lines.push(`<span class="lh-prov-label">Expected:</span> ${escapeHtml(entry.title || '?')} <span class="lh-prov-dim">by</span> ${escapeHtml(entry.artist_name || '?')}`);
+        }
+        // Downloaded line (what the source provided)
+        const srcTitle = entry.source_track_title || '';
+        const srcArtist = entry.source_artist || '';
+        if (srcTitle || srcArtist) {
+            const isMismatch = (srcTitle && entry.title && srcTitle.toLowerCase() !== entry.title.toLowerCase())
+                            || (srcArtist && entry.artist_name && srcArtist.toLowerCase() !== entry.artist_name.toLowerCase());
+            const mismatchClass = isMismatch ? ' lh-prov-mismatch' : '';
+            lines.push(`<span class="lh-prov-label">Downloaded:</span> <span class="${mismatchClass}">${escapeHtml(srcTitle || '?')} <span class="lh-prov-dim">by</span> ${escapeHtml(srcArtist || '?')}</span>`);
+        }
+        // Source file + ID line
+        if (entry.source_filename || entry.source_track_id) {
+            const fileParts = [];
+            if (entry.source_filename) fileParts.push(`<span class="lh-prov-label">File:</span> ${escapeHtml(entry.source_filename)}`);
+            if (entry.source_track_id) fileParts.push(`<span class="lh-prov-label">${entry.source_filename ? '' : 'Source '}ID:</span> ${escapeHtml(entry.source_track_id)}`);
+            lines.push(fileParts.join(` <span class="lh-prov-dim">·</span> `));
+        }
+        if (lines.length > 0) {
+            sourceDetail = `<div class="library-history-entry-source">${lines.join('<br>')}</div>`;
+        }
     }
 
-    return `<div class="library-history-entry">
+    const hasDetails = sourceDetail || acoustidBadge;
+    const expandIndicator = hasDetails ? `<span class="lh-expand-btn">&#x25BE;</span>` : '';
+
+    return `<div class="library-history-entry${hasDetails ? ' lh-expandable' : ''}" ${hasDetails ? 'onclick="this.classList.toggle(\'lh-expanded\')"' : ''}>
         ${thumb}
-        <div class="library-history-entry-text">
-            <div class="library-history-entry-title">${escapeHtml(entry.title || 'Unknown')}</div>
-            <div class="library-history-entry-meta">${escapeHtml(meta)}</div>
-            ${sourceDetail}
+        <div class="library-history-entry-content">
+            <div class="library-history-entry-row1">
+                <div class="library-history-entry-text">
+                    <div class="library-history-entry-title">${escapeHtml(entry.title || 'Unknown')}</div>
+                    <div class="library-history-entry-meta">${escapeHtml(meta)}</div>
+                </div>
+                <div class="library-history-entry-badges">${badge}</div>
+                <div class="library-history-entry-time">${formatHistoryTime(entry.created_at)}</div>
+                ${expandIndicator}
+            </div>
+            ${hasDetails ? `<div class="library-history-entry-details">
+                ${sourceDetail}
+                ${acoustidBadge ? `<div class="library-history-entry-badges" style="margin-top:4px">${acoustidBadge}</div>` : ''}
+            </div>` : ''}
         </div>
-        ${badge}${acoustidBadge}
-        <div class="library-history-entry-time">${formatHistoryTime(entry.created_at)}</div>
     </div>`;
 }
 
diff --git a/webui/static/style.css b/webui/static/style.css
index 69228b96..8f57e2dc 100644
--- a/webui/static/style.css
+++ b/webui/static/style.css
@@ -9365,7 +9365,7 @@ body.helper-mode-active #dashboard-activity-feed:hover {
 
 .library-history-entry {
     display: flex;
-    align-items: center;
+    align-items: flex-start;
     gap: 12px;
     padding: 10px 12px;
     border-left: 3px solid rgba(var(--accent-rgb), 0.15);
@@ -9400,6 +9400,20 @@ body.helper-mode-active #dashboard-activity-feed:hover {
     flex-shrink: 0;
 }
 
+.library-history-entry-content {
+    flex: 1;
+    min-width: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+
+.library-history-entry-row1 {
+    display: flex;
+    align-items: flex-start;
+    gap: 12px;
+}
+
 .library-history-entry-text {
     flex: 1;
     min-width: 0;
@@ -9423,14 +9437,67 @@ body.helper-mode-active #dashboard-activity-feed:hover {
     margin-top: 2px;
 }
 
+.library-history-entry-details {
+    display: none;
+    padding: 6px 0 2px;
+    border-top: 1px solid rgba(255, 255, 255, 0.04);
+    margin-top: 4px;
+    animation: stgSlideIn 0.2s ease-out;
+}
+.library-history-entry.lh-expanded .library-history-entry-details {
+    display: block;
+}
+
+.library-history-entry-badges {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 4px;
+    flex-shrink: 0;
+}
+
+.library-history-entry.lh-expandable {
+    cursor: pointer;
+}
+
+.lh-expand-btn {
+    color: rgba(255, 255, 255, 0.2);
+    font-size: 14px;
+    padding: 0 4px;
+    flex-shrink: 0;
+    transition: color 0.2s, transform 0.25s;
+    line-height: 1;
+}
+.library-history-entry.lh-expandable:hover .lh-expand-btn {
+    color: rgba(255, 255, 255, 0.5);
+}
+.library-history-entry.lh-expanded .lh-expand-btn {
+    transform: rotate(180deg);
+    color: var(--accent-color, #1db954);
+}
+
 .library-history-entry-source {
-    font-size: 10px;
-    color: rgba(255, 255, 255, 0.25);
-    white-space: nowrap;
+    font-size: 10.5px;
+    color: rgba(255, 255, 255, 0.35);
     overflow: hidden;
     text-overflow: ellipsis;
-    margin-top: 2px;
-    font-family: monospace;
+    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
+    word-break: break-all;
+    line-height: 1.6;
+    padding: 4px 0 0;
+}
+.lh-prov-label {
+    color: rgba(255, 255, 255, 0.2);
+    font-weight: 600;
+    text-transform: uppercase;
+    font-size: 9px;
+    letter-spacing: 0.3px;
+    margin-right: 4px;
+}
+.lh-prov-dim {
+    color: rgba(255, 255, 255, 0.15);
+}
+.lh-prov-mismatch {
+    color: #ef5350;
 }
 
 .library-history-badge {
@@ -9441,7 +9508,6 @@ body.helper-mode-active #dashboard-activity-feed:hover {
     padding: 3px 8px;
     border-radius: 4px;
     white-space: nowrap;
-    flex-shrink: 0;
 }
 
 .library-history-badge.download {
@@ -9477,6 +9543,8 @@ body.helper-mode-active #dashboard-activity-feed:hover {
     color: rgba(255, 255, 255, 0.25);
     white-space: nowrap;
     flex-shrink: 0;
+    margin-left: auto;
+    padding-top: 1px;
 }
 
 .library-history-empty {