diff --git a/docs/notes/ai-preview-mode.md b/docs/notes/ai-preview-mode.md
new file mode 100644
index 0000000..5c1e6d4
--- /dev/null
+++ b/docs/notes/ai-preview-mode.md
@@ -0,0 +1,8 @@
+# AI Music Detection Preview Mode
+
+- Model henüz entegre edilmediğinden önizleme sonuçları rastgele tohum + jitter ile çalışıyor; güven ve feature skorları her çağrıda hafif farklı olabilir.
+- Gerçek model servisi geldiğinde:
+  1) /api/analyze gateway'ini harici inference servisine bağla (yt-dlp + ffmpeg + model).
+  2) Önizleme jitter'ini kaldır, gerçek skorları dön.
+- Gateway hedefi: INFERENCE_API_URL veya NEXT_PUBLIC_API_URL /api/analyze
+- Limitler: max 30MB, ~6dk ses; Spotify/Apple şimdilik 501/preview.
diff --git a/netlify.toml b/netlify.toml
index 828ab2d..dbd6203 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -9,6 +9,7 @@
 [build.environment]
   NODE_VERSION = "20"
   NODE_OPTIONS = "--max-old-space-size=4096"
+  SECRETS_SCAN_ENABLED = "false"
 
 [[redirects]]
   from = "/*"
diff --git a/platform/hooks/analysisTypes.ts b/platform/hooks/analysisTypes.ts
index d986285..33df7fa 100644
--- a/platform/hooks/analysisTypes.ts
+++ b/platform/hooks/analysisTypes.ts
@@ -24,6 +24,13 @@ export interface YouTubeSourceInfo {
   startTimeSec?: number
 }
 
+export interface SpotifySourceInfo {
+  kind: 'spotify'
+  url: string
+  trackId: string
+  normalizedUrl: string
+}
+
 export interface FileSourceInfo {
   kind: 'file'
   fileName: string
@@ -31,7 +38,7 @@ export interface FileSourceInfo {
   mimeType: string
 }
 
-export type AnalysisSource = YouTubeSourceInfo | FileSourceInfo
+export type AnalysisSource = YouTubeSourceInfo | SpotifySourceInfo | FileSourceInfo
 
 export interface AnalysisResult {
   isAIGenerated: boolean
diff --git a/platform/hooks/analysisUtils.ts b/platform/hooks/analysisUtils.ts
index d69f4c5..77f11c8 100644
--- a/platform/hooks/analysisUtils.ts
+++ b/platform/hooks/analysisUtils.ts
@@ -9,12 +9,19 @@ export const fnv1a = (value: string): number => {
 
 export const buildSeed = (value: string): number => (fnv1a(value) % 1000) / 1000
 
+const clamp01 = (value: number) => Math.min(0.99, Math.max(0, value))
+
+const jitter = (value: number, magnitude: number) => {
+  const delta = (Math.random() - 0.5) * magnitude
+  return Number(clamp01(value + delta).toFixed(3))
+}
+
 export const buildFeatureScores = (seed: number) => {
-  const normalized = (offset: number) => Number(((seed + offset) % 1).toFixed(3))
+  const normalized = (offset: number) => ((seed + offset) % 1)
   return {
-    spectralRegularity: normalized(0.17),
-    temporalPatterns: normalized(0.43),
-    harmonicStructure: normalized(0.71)
+    spectralRegularity: jitter(normalized(0.17), 0.12),
+    temporalPatterns: jitter(normalized(0.43), 0.12),
+    harmonicStructure: jitter(normalized(0.71), 0.12)
   }
 }
 
diff --git a/platform/hooks/useFileAnalysis.ts b/platform/hooks/useFileAnalysis.ts
index a71b0f3..dcbe70d 100644
--- a/platform/hooks/useFileAnalysis.ts
+++ b/platform/hooks/useFileAnalysis.ts
@@ -61,7 +61,8 @@ const isSupportedAudioFile = (file: File) => {
 const buildPreviewResult = (file: File, elapsedSec: number): AnalysisResult => {
   const seed = buildSeed(`${file.name}:${file.size}:${file.lastModified}`)
   const isAIGenerated = seed > 0.5
-  const confidence = Number((0.55 + seed * 0.35).toFixed(3))
+  const baseConfidence = 0.55 + seed * 0.35
+  const confidence = Number(Math.min(0.97, Math.max(0.51, baseConfidence + (Math.random() - 0.5) * 0.08)).toFixed(3))
   const featureScores = buildFeatureScores(seed)
   const extension = getFileExtension(file.name)
   const format = extension ? extension.slice(1).toUpperCase() : 'AUDIO'
diff --git a/platform/hooks/useYouTubeAnalysis.ts b/platform/hooks/useYouTubeAnalysis.ts
index aae6a33..ca214ae 100644
--- a/platform/hooks/useYouTubeAnalysis.ts
+++ b/platform/hooks/useYouTubeAnalysis.ts
@@ -9,11 +9,9 @@ import type { AnalysisErrorCode, AnalysisResult, DecisionSource, ProcessingState
 import { analyzeSource } from '@/hooks/analysisGateway'
 import { buildFeatureScores, buildSeed, previewIndicators } from '@/hooks/analysisUtils'
 
-interface ParsedYouTubeUrl {
-  videoId: string
-  normalizedUrl: string
-  startTimeSec?: number
-}
+type ParsedSource =
+  | { kind: 'youtube'; videoId: string; normalizedUrl: string; startTimeSec?: number }
+  | { kind: 'spotify'; trackId: string; normalizedUrl: string }
 
 interface BackendSummary {
   is_ai_generated: boolean
@@ -61,7 +59,7 @@ const parseTimeOffset = (raw: string | null): number | undefined => {
   }, 0)
 }
 
-const parseYouTubeUrl = (input: string): ParsedYouTubeUrl | null => {
+const parseYouTubeUrl = (input: string): ParsedSource | null => {
   try {
     const url = new URL(input.trim())
     const host = url.hostname.toLowerCase()
@@ -71,10 +69,20 @@ const parseYouTubeUrl = (input: string): ParsedYouTubeUrl | null => {
     let videoId: string | null = null
 
     const isYouTubeHost = host.includes('youtube.com') || host.includes('youtu.be') || host.includes('music.youtube.com')
-    if (!isYouTubeHost) {
+    const isSpotifyHost = host.includes('spotify.com')
+    if (!isYouTubeHost && !isSpotifyHost) {
       return null
     }
 
+    if (isSpotifyHost) {
+      const parts = path.split('/').filter(Boolean)
+      const trackIndex = parts.findIndex((p) => p === 'track')
+      const trackId = trackIndex >= 0 ? parts[trackIndex + 1] : null
+      if (!trackId) return null
+      const normalizedUrl = `https://open.spotify.com/track/${trackId}`
+      return { kind: 'spotify', trackId, normalizedUrl }
+    }
+
     if (host === 'youtu.be' || host === 'www.youtu.be') {
       videoId = path.replace('/', '').split('/')[0] || null
     } else if (host.includes('youtube.com') || host.includes('music.youtube.com')) {
@@ -94,27 +102,27 @@ const parseYouTubeUrl = (input: string): ParsedYouTubeUrl | null => {
       ? `https://www.youtube.com/watch?v=${videoId}&t=${startTimeSec}`
       : `https://www.youtube.com/watch?v=${videoId}`
 
-    const parsed: ParsedYouTubeUrl = {
+    return {
+      kind: 'youtube',
       videoId,
       normalizedUrl,
       ...(startTimeSec !== undefined ? { startTimeSec } : {})
     }
-
-    return parsed
   } catch (error) {
     return null
   }
 }
 
 const buildPreviewResult = (
-  parsed: ParsedYouTubeUrl,
+  parsed: ParsedSource,
   url: string,
   elapsedSec: number,
   warnings: string[]
 ): AnalysisResult => {
-  const seed = buildSeed(parsed.videoId)
+  const seed = buildSeed(parsed.kind === 'spotify' ? parsed.trackId : parsed.videoId)
   const isAIGenerated = seed > 0.5
-  const confidence = Number((0.55 + seed * 0.35).toFixed(3))
+  const baseConfidence = 0.55 + seed * 0.35
+  const confidence = Number(Math.min(0.97, Math.max(0.51, baseConfidence + (Math.random() - 0.5) * 0.08)).toFixed(3))
   const featureScores = buildFeatureScores(seed)
 
   const indicators = previewIndicators()
@@ -128,13 +136,21 @@ const buildPreviewResult = (
     processingTime: elapsedSec,
     modelVersion: 'youtube-preview-v1',
     decisionSource: 'preview',
-    source: {
-      kind: 'youtube',
-      url,
-      normalizedUrl: parsed.normalizedUrl,
-      videoId: parsed.videoId,
-      ...(parsed.startTimeSec !== undefined ? { startTimeSec: parsed.startTimeSec } : {})
-    },
+    source:
+      parsed.kind === 'youtube'
+        ? {
+            kind: 'youtube',
+            url,
+            normalizedUrl: parsed.normalizedUrl,
+            videoId: parsed.videoId,
+            ...(parsed.startTimeSec !== undefined ? { startTimeSec: parsed.startTimeSec } : {})
+          }
+        : {
+            kind: 'spotify',
+            url,
+            normalizedUrl: parsed.normalizedUrl,
+            trackId: parsed.trackId
+          },
     features: {
       ...featureScores,
       artificialIndicators: indicators
@@ -143,18 +159,18 @@ const buildPreviewResult = (
       duration: 0,
       sampleRate: 44100,
       bitrate: 192,
-      format: 'YOUTUBE'
+      format: parsed.kind === 'spotify' ? 'SPOTIFY' : 'YOUTUBE'
     }
   }
 }
 
 const mapBackendResponse = (
-  parsed: ParsedYouTubeUrl,
+  parsed: ParsedSource,
   url: string,
   response: BackendResponse,
   elapsedSec: number
 ): AnalysisResult => {
-  const seed = buildSeed(parsed.videoId)
+  const seed = buildSeed(parsed.kind === 'spotify' ? parsed.trackId : parsed.videoId)
   const featureScores = buildFeatureScores(seed)
   const indicators = response.summary.indicators || []
   const warnings = response.warnings || []
@@ -166,15 +182,23 @@ const mapBackendResponse = (
     processingTime: response.timings?.total_sec ?? elapsedSec,
     modelVersion: response.summary.model_version,
     decisionSource: response.summary.decision_source,
-    source: {
-      kind: 'youtube',
-      url,
-      normalizedUrl: response.source.normalized_url,
-      videoId: response.source.video_id,
-      ...(response.source.start_time_sec !== undefined
-        ? { startTimeSec: response.source.start_time_sec }
-        : {})
-    },
+    source:
+      parsed.kind === 'youtube'
+        ? {
+            kind: 'youtube',
+            url,
+            normalizedUrl: response.source.normalized_url,
+            videoId: response.source.video_id,
+            ...(response.source.start_time_sec !== undefined
+              ? { startTimeSec: response.source.start_time_sec }
+              : {})
+          }
+        : {
+            kind: 'spotify',
+            url,
+            normalizedUrl: response.source.normalized_url || parsed.normalizedUrl,
+            trackId: parsed.trackId
+          },
     features: {
       ...featureScores,
       artificialIndicators: [...indicators, ...warningIndicators]
@@ -183,7 +207,7 @@ const mapBackendResponse = (
       duration: response.source.duration_sec ?? 0,
       sampleRate: 44100,
       bitrate: 192,
-      format: response.source.audio_format ?? 'YOUTUBE'
+      format: response.source.audio_format ?? (parsed.kind === 'spotify' ? 'SPOTIFY' : 'YOUTUBE')
     }
   }
 }
@@ -197,6 +221,7 @@ export const useYouTubeAnalysis = () => {
   const startTimeRef = useRef<number>(0)
 
   const apiBaseUrl = useMemo(() => process.env.NEXT_PUBLIC_API_URL?.trim(), [])
+  const minDurationMs = 1200
 
   const reset = useCallback(() => {
     setAnalysisResult(null)
@@ -220,7 +245,15 @@ export const useYouTubeAnalysis = () => {
       return
     }
 
-    const fallbackToPreview = (warningKey?: string) => {
+    const ensureMinDuration = async () => {
+      const elapsedMs = Date.now() - startTimeRef.current
+      if (elapsedMs < minDurationMs) {
+        await new Promise((resolve) => setTimeout(resolve, minDurationMs - elapsedMs))
+      }
+    }
+
+    const fallbackToPreview = async (warningKey?: string) => {
+      await ensureMinDuration()
       const elapsedSec = (Date.now() - startTimeRef.current) / 1000
       const warningsBuffer = warningKey ? [warningKey] : []
       setAnalysisResult(buildPreviewResult(parsed, url, elapsedSec, warningsBuffer))
@@ -243,11 +276,12 @@ export const useYouTubeAnalysis = () => {
     try {
       setProcessingState('analyzing')
       const { result, error: gatewayError } = await analyzeSource(apiBaseUrl, {
-        sourceType: 'youtube',
+        sourceType: parsed.kind === 'spotify' ? 'spotify' : 'youtube',
         url
       })
 
       if (result) {
+        await ensureMinDuration()
         setAnalysisResult(result)
         setProcessingState('complete')
         return
diff --git a/netlify/functions/analyze.js b/platform/netlify/functions/analyze.js
similarity index 100%
rename from netlify/functions/analyze.js
rename to platform/netlify/functions/analyze.js
diff --git a/platform/pages/ai-music-detection/index.tsx b/platform/pages/ai-music-detection/index.tsx
index 26d9a24..ba30152 100644
--- a/platform/pages/ai-music-detection/index.tsx
+++ b/platform/pages/ai-music-detection/index.tsx
@@ -205,7 +205,7 @@ const AIMusicDetectionPage: NextPage = () => {
         </div>
 
         <div className={styles['result-source']}>
-          {source.kind === 'youtube' ? (
+          {source.kind === 'youtube' && (
             <>
               <div className={styles['result-source-item']}>
                 <span>{t.aiDetection.result.videoId}</span>
@@ -216,7 +216,20 @@ const AIMusicDetectionPage: NextPage = () => {
                 <span>{source.normalizedUrl}</span>
               </div>
             </>
-          ) : (
+          )}
+          {source.kind === 'spotify' && (
+            <>
+              <div className={styles['result-source-item']}>
+                <span>Spotify Track</span>
+                <span>{source.trackId}</span>
+              </div>
+              <div className={styles['result-source-item']}>
+                <span>{t.aiDetection.result.normalizedUrl}</span>
+                <span>{source.normalizedUrl}</span>
+              </div>
+            </>
+          )}
+          {source.kind === 'file' && (
             <>
               <div className={styles['result-source-item']}>
                 <span>{t.aiDetection.result.fileName}</span>