diff --git a/admin-compliance/app/api/sdk/v1/dsms/[[...path]]/route.ts b/admin-compliance/app/api/sdk/v1/dsms/[[...path]]/route.ts
new file mode 100644
index 0000000..546d019
--- /dev/null
+++ b/admin-compliance/app/api/sdk/v1/dsms/[[...path]]/route.ts
@@ -0,0 +1,22 @@
+/**
+ * DSMS Gateway Proxy — forwards verify/history requests to dsms-gateway.
+ */
+import { NextRequest, NextResponse } from 'next/server'
+
+const DSMS_URL = process.env.DSMS_GATEWAY_URL || 'http://dsms-gateway:8082'
+
+export async function GET(request: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  const { path } = await params
+  const target = `${DSMS_URL}/api/v1/${path.join('/')}`
+
+  try {
+    const resp = await fetch(target, {
+      headers: { Authorization: 'Bearer system-frontend' },
+      signal: AbortSignal.timeout(15000),
+    })
+    const data = await resp.json()
+    return NextResponse.json(data, { status: resp.status })
+  } catch {
+    return NextResponse.json({ error: 'DSMS not available' }, { status: 503 })
+  }
+}
diff --git a/admin-compliance/app/sdk/gap-analysis/_components/GapDashboard.tsx b/admin-compliance/app/sdk/gap-analysis/_components/GapDashboard.tsx
index 5201cb7..2f395bf 100644
--- a/admin-compliance/app/sdk/gap-analysis/_components/GapDashboard.tsx
+++ b/admin-compliance/app/sdk/gap-analysis/_components/GapDashboard.tsx
@@ -3,6 +3,7 @@
 import React, { useState } from 'react'
 
 interface GapReport {
+  dsms_cid?: string
   profile_name: string
   regulations: Array<{
     id: string
@@ -79,6 +80,20 @@ export function GapDashboard({ report, onBack }: Props) {
         &larr; Neue Analyse
       </button>
 
+      {/* DSMS Archive Badge */}
+      {report.dsms_cid && (
+        <div className="mb-4 flex items-center gap-2 px-4 py-2.5 bg-emerald-50 border border-emerald-200 rounded-lg">
+          <svg className="w-4 h-4 text-emerald-600 flex-shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
+          </svg>
+          <span className="text-sm text-emerald-800 font-medium">Revisionssicher archiviert</span>
+          <code className="text-xs text-emerald-600 bg-emerald-100 px-2 py-0.5 rounded font-mono">
+            {report.dsms_cid.length > 20 ? report.dsms_cid.slice(0, 8) + '...' + report.dsms_cid.slice(-6) : report.dsms_cid}
+          </code>
+          <span className="text-[10px] text-emerald-500">DSMS/IPFS</span>
+        </div>
+      )}
+
       {/* Summary Cards */}
       <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-8">
         <SummaryCard
diff --git a/ai-compliance-sdk/internal/api/handlers/gap_handler.go b/ai-compliance-sdk/internal/api/handlers/gap_handler.go
index b818264..709c847 100644
--- a/ai-compliance-sdk/internal/api/handlers/gap_handler.go
+++ b/ai-compliance-sdk/internal/api/handlers/gap_handler.go
@@ -1,12 +1,16 @@
 package handlers
 
 import (
+	"encoding/json"
+	"fmt"
 	"net/http"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5/pgxpool"
 
+	"github.com/breakpilot/ai-compliance-sdk/internal/dsms"
 	"github.com/breakpilot/ai-compliance-sdk/internal/gap"
 )
 
@@ -104,7 +108,27 @@ func (h *GapHandler) AnalyzeProject(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, report)
+	// Archive gap report to DSMS (non-blocking, best-effort)
+	var dsmsCID string
+	reportJSON, _ := json.Marshal(report)
+	filename := fmt.Sprintf("gap-report-%s-%s.json", id.String()[:8], time.Now().Format("2006-01-02"))
+	if result := dsms.Archive(reportJSON, filename, "gap_report", id.String(), "1"); result != nil {
+		dsmsCID = result.CID
+	}
+
+	// Return report with DSMS CID appended
+	response := gin.H{
+		"profile_id":   report.ProfileID,
+		"profile_name": report.ProfileName,
+		"regulations":  report.Regulations,
+		"summary":      report.Summary,
+		"gaps":         report.Gaps,
+		"created_at":   report.CreatedAt,
+	}
+	if dsmsCID != "" {
+		response["dsms_cid"] = dsmsCID
+	}
+	c.JSON(http.StatusOK, response)
 }
 
 // QuickAnalyze runs gap analysis without saving a project.
diff --git a/ai-compliance-sdk/internal/dsms/client.go b/ai-compliance-sdk/internal/dsms/client.go
new file mode 100644
index 0000000..ae5f66d
--- /dev/null
+++ b/ai-compliance-sdk/internal/dsms/client.go
@@ -0,0 +1,103 @@
+// Package dsms provides a client for archiving compliance artifacts to the
+// DSMS gateway (IPFS-backed tamper-proof document storage).
+package dsms
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"os"
+	"time"
+)
+
+// ArchiveResult is the response from a successful DSMS archive operation.
+type ArchiveResult struct {
+	CID        string `json:"cid"`
+	Size       int    `json:"size"`
+	GatewayURL string `json:"gateway_url"`
+}
+
+var gatewayURL = getEnv("DSMS_GATEWAY_URL", "http://dsms-gateway:8082")
+
+func getEnv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}
+
+// Archive stores content in DSMS and returns the CID.
+// Non-critical: returns nil on failure (logs warning).
+func Archive(content []byte, filename, documentType, documentID, version string) *ArchiveResult {
+	var buf bytes.Buffer
+	w := multipart.NewWriter(&buf)
+
+	part, err := w.CreateFormFile("file", filename)
+	if err != nil {
+		log.Printf("[dsms] multipart error: %v", err)
+		return nil
+	}
+	if _, err := part.Write(content); err != nil {
+		log.Printf("[dsms] write error: %v", err)
+		return nil
+	}
+
+	_ = w.WriteField("document_type", documentType)
+	_ = w.WriteField("document_id", documentID)
+	_ = w.WriteField("version", version)
+	_ = w.WriteField("language", "de")
+	w.Close()
+
+	client := &http.Client{Timeout: 60 * time.Second}
+	req, err := http.NewRequest("POST", gatewayURL+"/api/v1/documents", &buf)
+	if err != nil {
+		log.Printf("[dsms] request error: %v", err)
+		return nil
+	}
+	req.Header.Set("Content-Type", w.FormDataContentType())
+	req.Header.Set("Authorization", "Bearer system-backend")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Printf("[dsms] unavailable: %v", err)
+		return nil
+	}
+	defer resp.Body.Close()
+
+	body, _ := io.ReadAll(resp.Body)
+	if resp.StatusCode != 200 {
+		log.Printf("[dsms] archive failed (%d): %s", resp.StatusCode, string(body[:min(len(body), 200)]))
+		return nil
+	}
+
+	var result ArchiveResult
+	if err := json.Unmarshal(body, &result); err != nil {
+		log.Printf("[dsms] parse error: %v", err)
+		return nil
+	}
+
+	log.Printf("[dsms] archived: %s → CID %s (%d bytes)", filename, result.CID, result.Size)
+	return &result
+}
+
+// Verify checks document integrity by CID.
+func Verify(cid string) (bool, error) {
+	client := &http.Client{Timeout: 15 * time.Second}
+	resp, err := client.Get(fmt.Sprintf("%s/api/v1/verify/%s", gatewayURL, cid))
+	if err != nil {
+		return false, err
+	}
+	defer resp.Body.Close()
+	return resp.StatusCode == 200, nil
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
diff --git a/backend-compliance/compliance/services/dsms_client.py b/backend-compliance/compliance/services/dsms_client.py
new file mode 100644
index 0000000..adea1e2
--- /dev/null
+++ b/backend-compliance/compliance/services/dsms_client.py
@@ -0,0 +1,91 @@
+"""DSMS (Dezentrales Daten Speicher System) Client — archives compliance
+artifacts to IPFS via the dsms-gateway for tamper-proof versioning.
+
+Usage:
+    from compliance.services.dsms_client import archive_to_dsms, verify_dsms
+
+    result = await archive_to_dsms(
+        content=pdf_bytes,
+        filename="gap-report-2026-05-11.json",
+        document_type="gap_report",
+        document_id=str(report_id),
+        version="1",
+    )
+    cid = result["cid"]  # IPFS Content Identifier
+"""
+
+import logging
+import os
+
+import httpx
+
+logger = logging.getLogger(__name__)
+
+DSMS_GATEWAY_URL = os.environ.get("DSMS_GATEWAY_URL", "http://dsms-gateway:8082")
+
+
+async def archive_to_dsms(
+    content: bytes,
+    filename: str,
+    document_type: str,
+    document_id: str,
+    version: str = "1",
+    parent_cid: str | None = None,
+    language: str = "de",
+    tenant_id: str | None = None,
+) -> dict:
+    """Archive binary content to DSMS (IPFS).
+
+    Returns dict with keys: cid, size, gateway_url.
+    Returns empty dict on failure (non-critical — logs warning).
+    """
+    data = {
+        "document_type": document_type,
+        "document_id": document_id,
+        "version": version,
+        "language": language,
+    }
+    if parent_cid:
+        data["parent_cid"] = parent_cid
+    if tenant_id:
+        data["tenant_id"] = tenant_id
+
+    try:
+        async with httpx.AsyncClient(timeout=60.0) as client:
+            resp = await client.post(
+                f"{DSMS_GATEWAY_URL}/api/v1/documents",
+                files={"file": (filename, content)},
+                data=data,
+                headers={"Authorization": "Bearer system-backend"},
+            )
+
+        if resp.status_code != 200:
+            logger.warning("DSMS archive failed (%d): %s", resp.status_code, resp.text[:200])
+            return {}
+
+        result = resp.json()
+        logger.info("DSMS archived: %s → CID %s (%d bytes)", filename, result.get("cid", "?"), result.get("size", 0))
+        return result
+
+    except Exception as e:
+        logger.warning("DSMS archive unavailable: %s", e)
+        return {}
+
+
+async def verify_dsms(cid: str) -> dict:
+    """Verify a document's integrity by CID.
+
+    Returns dict with verification result or empty dict on failure.
+    """
+    try:
+        async with httpx.AsyncClient(timeout=15.0) as client:
+            resp = await client.get(f"{DSMS_GATEWAY_URL}/api/v1/verify/{cid}")
+
+        if resp.status_code != 200:
+            return {"valid": False, "error": f"HTTP {resp.status_code}"}
+
+        return resp.json()
+
+    except Exception as e:
+        logger.warning("DSMS verify unavailable: %s", e)
+        return {"valid": False, "error": str(e)}