diff --git a/php/tests/ProFileGeneratorTest.php b/php/tests/ProFileGeneratorTest.php
index 111ade5..7671d97 100644
--- a/php/tests/ProFileGeneratorTest.php
+++ b/php/tests/ProFileGeneratorTest.php
@@ -6,6 +6,9 @@ namespace ProPresenter\Parser\Tests;
 
 use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
+use ProPresenter\Parser\PresentationBundle;
+use ProPresenter\Parser\ProBundleReader;
+use ProPresenter\Parser\ProBundleWriter;
 use ProPresenter\Parser\ProFileGenerator;
 use ProPresenter\Parser\ProFileReader;
 use ProPresenter\Parser\ProFileWriter;
@@ -1014,4 +1017,140 @@ class ProFileGeneratorTest extends TestCase
         $this->assertNotNull($image->getFile()->getLocalUrl());
         $this->assertSame('file:///Users/test/AI/Media/test-image.png', $image->getFile()->getLocalUrl()->getAbsoluteString());
     }
+
+    #[Test]
+    public function testGeneratedProFileMatchesProPresenterNativeStructure(): void
+    {
+        $song = ProFileGenerator::generate(
+            'TestBild',
+            [[
+                'name' => 'Verse 1',
+                'color' => [0.0, 0.0, 0.0, 1.0],
+                'slides' => [[
+                    'label' => 'test-background',
+                    'media' => 'file:///Users/thorsten/AI/propresenter/ref/Media/test-background.png',
+                    'format' => 'png',
+                    'mediaWidth' => 200,
+                    'mediaHeight' => 150,
+                ]],
+            ]],
+            [['name' => 'normal', 'groupNames' => ['Verse 1']]],
+        );
+
+        $p = $song->getPresentation();
+
+        // Fix 1: UUIDs are uppercase
+        $this->assertMatchesRegularExpression(
+            '/^[A-F0-9]{8}-[A-F0-9]{4}-4[A-F0-9]{3}-[89AB][A-F0-9]{3}-[A-F0-9]{12}$/',
+            $p->getUuid()->getString(),
+            'Presentation UUID must be uppercase',
+        );
+
+        // Fix 2: Separate platform and application versions
+        $appInfo = $p->getApplicationInfo();
+        $this->assertSame(14, $appInfo->getPlatformVersion()->getMajorVersion());
+        $this->assertSame(8, $appInfo->getPlatformVersion()->getMinorVersion());
+        $this->assertSame(3, $appInfo->getPlatformVersion()->getPatchVersion());
+        $this->assertSame(20, $appInfo->getApplicationVersion()->getMajorVersion());
+        $this->assertSame('335544354', $appInfo->getApplicationVersion()->getBuild());
+
+        // Fix 3a: Background present
+        $this->assertNotNull($p->getBackground(), 'Background must be set');
+        $this->assertSame(1.0, $p->getBackground()->getColor()->getAlpha());
+
+        // Fix 3b: ChordChart on Presentation
+        $this->assertNotNull($p->getChordChart(), 'Presentation chordChart must be set');
+
+        // Fix 3c: CCLI always present (even with no data)
+        $this->assertNotNull($p->getCcli(), 'CCLI must always be set');
+
+        // Fix 3d: Timeline
+        $this->assertNotNull($p->getTimeline(), 'Timeline must be set');
+        $this->assertSame(300.0, $p->getTimeline()->getDuration());
+
+        // Fix 4: HotKey on Group and Cue
+        $this->assertNotNull($p->getCueGroups()[0]->getGroup()->getHotKey(), 'Group must have hotKey');
+        $this->assertNotNull($p->getCues()[0]->getHotKey(), 'Cue must have hotKey');
+
+        // Fix 5a: Slide size 1920x1080
+        $slidePresentation = $p->getCues()[0]->getActions()[0]->getSlide()->getPresentation();
+        $size = $slidePresentation->getBaseSlide()->getSize();
+        $this->assertNotNull($size, 'Slide must have size');
+        $this->assertSame(1920.0, $size->getWidth());
+        $this->assertSame(1080.0, $size->getHeight());
+
+        // Fix 5b: PresentationSlide chordChart
+        $this->assertNotNull($slidePresentation->getChordChart(), 'PresentationSlide must have chordChart');
+
+        // Fix 6: LOCAL PATH ROOT_USER_HOME for /Users/ paths
+        $mediaUrl = $p->getCues()[0]->getActions()[1]->getMedia()->getElement()->getUrl();
+        $this->assertSame(2, $mediaUrl->getLocal()->getRoot(), 'Must use ROOT_USER_HOME (2) for /Users/ paths');
+        $this->assertSame('AI/propresenter/ref/Media/test-background.png', $mediaUrl->getLocal()->getPath());
+
+        // Fix 7a: Media action name
+        $mediaAction = $p->getCues()[0]->getActions()[1];
+        $this->assertSame('test-background', $mediaAction->getName());
+
+        // Fix 7b: MediaType.audio set (oneof discriminator)
+        $this->assertNotNull($mediaAction->getMedia()->getAudio(), 'MediaType must have audio set');
+
+        // Fix 7c: ImageTypeProperties with drawing and file
+        $img = $mediaAction->getMedia()->getElement()->getImage();
+        $this->assertNotNull($img->getDrawing(), 'ImageTypeProperties must have drawing');
+        $this->assertSame(200.0, $img->getDrawing()->getNaturalSize()->getWidth());
+        $this->assertSame(150.0, $img->getDrawing()->getNaturalSize()->getHeight());
+        $this->assertNotNull($img->getDrawing()->getCustomImageBounds());
+        $this->assertNotNull($img->getDrawing()->getCropInsets());
+        $this->assertNotNull($img->getFile(), 'ImageTypeProperties must have file');
+        $this->assertNotNull($img->getFile()->getLocalUrl());
+        $this->assertSame(
+            'file:///Users/thorsten/AI/propresenter/ref/Media/test-background.png',
+            $img->getFile()->getLocalUrl()->getAbsoluteString(),
+        );
+    }
+
+    #[Test]
+    public function testBundleRoundTripWithGeneratedSong(): void
+    {
+        $song = ProFileGenerator::generate(
+            'TestBild',
+            [[
+                'name' => 'Verse 1',
+                'color' => [0.0, 0.0, 0.0, 1.0],
+                'slides' => [[
+                    'label' => 'test-background',
+                    'media' => 'file:///Users/thorsten/AI/propresenter/ref/Media/test-background.png',
+                    'format' => 'png',
+                    'mediaWidth' => 200,
+                    'mediaHeight' => 150,
+                ]],
+            ]],
+            [['name' => 'normal', 'groupNames' => ['Verse 1']]],
+        );
+
+        $fakeImageBytes = "\x89PNG\r\n\x1a\n" . str_repeat("\x00", 100);
+
+        $bundle = new PresentationBundle(
+            $song,
+            'TestBild.pro',
+            ['Media/test-background.png' => $fakeImageBytes],
+        );
+
+        $path = $this->tmpDir . '/TestBild.probundle';
+        ProBundleWriter::write($bundle, $path);
+
+        $this->assertFileExists($path);
+
+        $read = ProBundleReader::read($path);
+        $this->assertSame('TestBild', $read->getName());
+        $this->assertSame('TestBild.pro', $read->getProFilename());
+        $this->assertSame(1, $read->getMediaFileCount());
+        $this->assertTrue($read->hasMediaFile('Media/test-background.png'));
+
+        // UUID preserved through serialization
+        $this->assertSame(
+            $song->getPresentation()->getUuid()->getString(),
+            $read->getSong()->getPresentation()->getUuid()->getString(),
+        );
+    }
 }