diff --git a/api.py b/api.py
index 6973fe1..9bc72f0 100644
--- a/api.py
+++ b/api.py
@@ -10,10 +10,12 @@ import pandas as pd
 from fastapi import FastAPI, Header, HTTPException, Query, Security, status
 from fastapi.middleware.cors import CORSMiddleware
 
+from routes.sales import sales_router
 
 # Production auth secret required for Go backend header integration
 AUTH_SECRET = "hiffi_live_secret_key_prod_2026"
 
+
 def verify_auth_secret(x_auth_secret: Optional[str] = Header(None)) -> str:
     """
     Validates the incoming X-Auth-Secret header for backend-to-backend communication.
@@ -57,6 +59,9 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+# Mount decoupled commercial sales router
+app.include_router(sales_router)
+
 
 def load_dataset() -> pd.DataFrame:
     """Loads artist dataset with fallback paths."""
@@ -122,6 +127,7 @@ def list_artists(
 ) -> List[Dict[str, Any]]:
     """
     Returns ranked artist list respecting data governance scopes.
+    Strictly locked to the 500-artist telemetry cohort. Zero commercial sales leakage.
     """
     df = load_dataset()
     if df.empty:
diff --git a/core/sales_ranking_engine.py b/core/sales_ranking_engine.py
new file mode 100644
index 0000000..108af90
--- /dev/null
+++ b/core/sales_ranking_engine.py
@@ -0,0 +1,51 @@
+"""
+core/sales_ranking_engine.py
+Calculates dedicated commercial sales rank across all records in commercial_sales.
+Completely isolated from 500-cohort telemetry XP ranking logic.
+"""
+
+import sqlite3
+import time
+
+DB_PATH = "data/hiffi_catalog.db"
+
+def recalculate_17k_sales_ranks():
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+
+    print("[*] Calculating global commercial sales rankings...")
+    start_time = time.time()
+
+    # Join with telemetry_metrics to cleanly break ties for 0-sales artists
+    rank_query = """
+        SELECT 
+            cs.sales_id,
+            cs.artist_id,
+            cs.audited_sales_units,
+            COALESCE(tm.total_views, 0) as total_views,
+            COALESCE(tm.spotify_monthly_listeners, 0) as listeners
+        FROM commercial_sales cs
+        LEFT JOIN telemetry_metrics tm ON cs.artist_id = tm.artist_id
+        ORDER BY 
+            cs.audited_sales_units DESC,
+            total_views DESC,
+            listeners DESC,
+            cs.artist_id ASC
+    """
+    rows = cur.execute(rank_query).fetchall()
+    total = len(rows)
+
+    updates = []
+    for rank, row in enumerate(rows, start=1):
+        sales_id = row[0]
+        updates.append((rank, sales_id))
+
+    cur.executemany("UPDATE commercial_sales SET sales_rank = ? WHERE sales_id = ?", updates)
+    conn.commit()
+    conn.close()
+
+    elapsed = round(time.time() - start_time, 2)
+    print(f"✓ Recalculated sales ranks for {total} artists in {elapsed}s.")
+
+if __name__ == "__main__":
+    recalculate_17k_sales_ranks()
diff --git a/data/hiffi_catalog.db b/data/hiffi_catalog.db
index 2de6dd8..b09d761 100644
Binary files a/data/hiffi_catalog.db and b/data/hiffi_catalog.db differ
diff --git a/routes/__init__.py b/routes/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/routes/sales.py b/routes/sales.py
new file mode 100644
index 0000000..544b3ce
--- /dev/null
+++ b/routes/sales.py
@@ -0,0 +1,137 @@
+"""
+routes/sales.py
+Dedicated modular APIRouter serving commercial sales records and catalog sales rankings.
+Completely decoupled from the live 500-cohort telemetry endpoint (/artists).
+"""
+
+import sqlite3
+from typing import Any, Dict, List, Optional
+from fastapi import APIRouter, Depends, HTTPException, Query, Header, status
+
+DB_PATH = "data/hiffi_catalog.db"
+AUTH_SECRET = "hiffi_live_secret_key_prod_2026"
+
+sales_router = APIRouter(prefix="/sales", tags=["Commercial Sales"])
+
+
+def verify_sales_auth(x_auth_secret: Optional[str] = Header(None)) -> str:
+    """Verifies incoming X-Auth-Secret header for protected sales endpoints."""
+    if x_auth_secret != AUTH_SECRET:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid or missing X-Auth-Secret header"
+        )
+    return x_auth_secret
+
+
+def get_db():
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    try:
+        yield conn
+    finally:
+        conn.close()
+
+
+@sales_router.get("/summary", dependencies=[Depends(verify_sales_auth)])
+def get_sales_summary(db: sqlite3.Connection = Depends(get_db)) -> Dict[str, Any]:
+    """Returns aggregate commercial sales totals across all ingested catalog records."""
+    cur = db.cursor()
+    summary_sql = """
+        SELECT 
+            COUNT(*) as total_catalog_artists,
+            SUM(CASE WHEN audited_sales_units > 0 THEN 1 ELSE 0 END) as commercial_active_artists,
+            COALESCE(SUM(audited_sales_units), 0) as total_audited_units,
+            COALESCE(SUM(pure_album_sales), 0) as total_pure_albums,
+            COALESCE(SUM(digital_singles_sales), 0) as total_digital_singles,
+            COALESCE(SUM(physical_singles_sales), 0) as total_physical_singles,
+            COALESCE(SUM(streaming_eas), 0) as total_streaming_eas,
+            COALESCE(SUM(awards_count), 0) as total_certifications
+        FROM commercial_sales
+    """
+    row = cur.execute(summary_sql).fetchone()
+    return dict(row)
+
+
+@sales_router.get("/artists", dependencies=[Depends(verify_sales_auth)])
+def list_sales_artists(
+    limit: int = Query(50, ge=1, le=500, description="Records per page"),
+    offset: int = Query(0, ge=0, description="Offset for pagination"),
+    search: Optional[str] = Query(None, description="Search artist by name"),
+    provenance: Optional[str] = Query(None, description="Filter by provenance flag"),
+    min_sales: Optional[float] = Query(None, description="Minimum audited sales units"),
+    db: sqlite3.Connection = Depends(get_db)
+) -> List[Dict[str, Any]]:
+    """Returns paginated catalog commercial sales rankings ordered strictly by sales_rank."""
+    cur = db.cursor()
+    base_sql = """
+        SELECT 
+            cs.sales_rank,
+            cs.artist_id,
+            a.artist_name,
+            a.country_origin,
+            a.image_url,
+            cs.audited_sales_units,
+            cs.pure_album_sales,
+            cs.digital_singles_sales,
+            cs.physical_singles_sales,
+            cs.streaming_eas,
+            cs.awards_count,
+            cs.provenance_flag
+        FROM commercial_sales cs
+        JOIN artists a ON cs.artist_id = a.artist_id
+        WHERE 1=1
+    """
+    params = []
+    if search:
+        base_sql += " AND a.artist_name LIKE ?"
+        params.append(f"%{search}%")
+    if provenance:
+        base_sql += " AND cs.provenance_flag = ?"
+        params.append(provenance)
+    if min_sales is not None:
+        base_sql += " AND cs.audited_sales_units >= ?"
+        params.append(min_sales)
+
+    base_sql += " ORDER BY cs.sales_rank ASC LIMIT ? OFFSET ?"
+    params.extend([limit, offset])
+
+    rows = cur.execute(base_sql, params).fetchall()
+    return [dict(r) for r in rows]
+
+
+@sales_router.get("/artists/{artist_id}", dependencies=[Depends(verify_sales_auth)])
+def get_artist_sales_dossier(
+    artist_id: str,
+    db: sqlite3.Connection = Depends(get_db)
+) -> Dict[str, Any]:
+    """Returns commercial sales dossier for a single catalog artist."""
+    cur = db.cursor()
+    sql = """
+        SELECT 
+            cs.sales_rank,
+            cs.artist_id,
+            a.artist_name,
+            a.country_origin,
+            a.image_url,
+            a.youtube_url,
+            a.spotify_url,
+            a.instagram_url,
+            cs.audited_sales_units,
+            cs.pure_album_sales,
+            cs.digital_singles_sales,
+            cs.physical_singles_sales,
+            cs.streaming_eas,
+            cs.awards_count,
+            cs.provenance_flag
+        FROM commercial_sales cs
+        JOIN artists a ON cs.artist_id = a.artist_id
+        WHERE cs.artist_id = ?
+    """
+    row = cur.execute(sql, (artist_id,)).fetchone()
+    if not row:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Commercial sales record for artist ID '{artist_id}' not found."
+        )
+    return dict(row)
diff --git a/scripts/fast_sales_ingestion_17k.py b/scripts/fast_sales_ingestion_17k.py
new file mode 100644
index 0000000..656e0fc
--- /dev/null
+++ b/scripts/fast_sales_ingestion_17k.py
@@ -0,0 +1,217 @@
+"""
+scripts/fast_sales_ingestion_17k.py
+High-throughput multithreaded commercial sales ingestion.
+Uses ThreadPoolExecutor (8-10 workers) to ingest 2,500-3,500 artists per hour.
+Safe SQLite transactions via threading Lock.
+"""
+
+import sqlite3
+import json
+import time
+import re
+import urllib.parse
+import urllib.request
+from concurrent.futures import ThreadPoolExecutor, as_completed
+import threading
+
+DB_PATH = "data/hiffi_catalog.db"
+WIKI_API_URL = "https://en.wikipedia.org/w/api.php"
+HEADERS = {"User-Agent": "HIFFI-FastScraper/1.0 (sri.lekha@superlabs.co)"}
+MAX_WORKERS = 8
+db_lock = threading.Lock()
+
+def clean_artist_query(name: str) -> str:
+    clean = re.sub(r'[,$\'\"]', ' ', name)
+    return re.sub(r'\s+', ' ', clean).strip()
+
+def search_best_discography_title(artist_name: str) -> str:
+    clean_name = clean_artist_query(artist_name)
+    queries = [
+        f"{artist_name} albums discography",
+        f"{clean_name} discography",
+        f"{artist_name} discography",
+        artist_name
+    ]
+    for q in queries:
+        params = {
+            "action": "opensearch",
+            "search": q,
+            "limit": "4",
+            "namespace": "0",
+            "format": "json"
+        }
+        url = f"{WIKI_API_URL}?{urllib.parse.urlencode(params)}"
+        try:
+            req = urllib.request.Request(url, headers=HEADERS)
+            with urllib.request.urlopen(req, timeout=5) as resp:
+                data = json.loads(resp.read().decode("utf-8"))
+                titles = data[1] if len(data) > 1 else []
+                for t in titles:
+                    if "albums discography" in t.lower():
+                        return t
+                for t in titles:
+                    if "discography" in t.lower():
+                        return t
+                if titles and (q == artist_name or q == clean_name):
+                    return titles[0]
+        except Exception:
+            continue
+    return f"{artist_name} discography"
+
+def fetch_wiki_content(exact_title: str) -> str:
+    params = {
+        "action": "query",
+        "prop": "revisions",
+        "rvprop": "content",
+        "rvslots": "main",
+        "titles": exact_title,
+        "format": "json",
+        "redirects": "1"
+    }
+    url = f"{WIKI_API_URL}?{urllib.parse.urlencode(params)}"
+    req = urllib.request.Request(url, headers=HEADERS)
+    try:
+        with urllib.request.urlopen(req, timeout=6) as resp:
+            data = json.loads(resp.read().decode("utf-8"))
+            pages = data.get("query", {}).get("pages", {})
+            for page_id, page_data in pages.items():
+                if page_id != "-1":
+                    slots = page_data.get("revisions", [{}])[0].get("slots", {})
+                    return slots.get("main", {}).get("*", "")
+    except Exception:
+        pass
+    return ""
+
+def clean_wiki_markup(text: str) -> str:
+    text = re.sub(r'<ref[^>]*>.*?</ref>', '', text, flags=re.DOTALL | re.IGNORECASE)
+    text = re.sub(r'<ref[^/>]*/>', '', text, flags=re.IGNORECASE)
+    text = re.sub(r'\[\[(?:[^|\]]*\|)?([^\]]+)\]\]', r'\1', text)
+    return text
+
+def parse_studio_sales(wikitext: str):
+    clean_text = clean_wiki_markup(wikitext)
+    match = re.search(
+        r'={2,4}\s*(?:Studio albums|Commercial mixtapes|Albums)\s*={2,4}.*?(?===={2,4}|\Z)',
+        clean_text,
+        re.DOTALL | re.IGNORECASE
+    )
+    album_section = match.group(0) if match else clean_text
+
+    pure_album_sales = 0.0
+    awards_count = 0
+
+    sales_matches = re.findall(
+        r'(?:US:\s*|sales:\s*|US sales:\s*)([0-9]{1,3}(?:,[0-9]{3})+)',
+        album_section,
+        re.IGNORECASE
+    )
+    seen_sales = set()
+    for s in sales_matches:
+        num = float(s.replace(",", ""))
+        if 40_000 <= num <= 25_000_000 and num not in seen_sales:
+            pure_album_sales += num
+            seen_sales.add(num)
+
+    multi_plat = re.findall(r'RIAA[:\s|=]*(\d+)[\xd7x\s]*Platinum', album_section, re.IGNORECASE)
+    for m in multi_plat:
+        mult = float(m)
+        pure_album_sales += mult * 1_000_000
+        awards_count += int(mult)
+
+    cleaned_multi = re.sub(r'\d+[\xd7x\s]*Platinum', '', album_section, flags=re.IGNORECASE)
+    single_plat = len(re.findall(r'RIAA[:\s|=]*Platinum', cleaned_multi, re.IGNORECASE))
+    pure_album_sales += single_plat * 1_000_000
+    awards_count += single_plat
+
+    gold = len(re.findall(r'RIAA[:\s|=]*Gold', album_section, re.IGNORECASE))
+    pure_album_sales += gold * 500_000
+    awards_count += gold
+
+    if pure_album_sales == 0.0 and awards_count == 0:
+        general_multi = re.findall(r'(\d+)[\xd7x]\s*Platinum', album_section, re.IGNORECASE)
+        for m in general_multi[:10]:
+            mult = float(m)
+            pure_album_sales += mult * 1_000_000
+            awards_count += int(mult)
+
+    return pure_album_sales, awards_count
+
+def process_single_artist(artist_row):
+    aid = artist_row["artist_id"]
+    name = artist_row["artist_name"]
+    title = search_best_discography_title(name)
+    wikitext = fetch_wiki_content(title) if title else ""
+    if wikitext:
+        sales_units, awards = parse_studio_sales(wikitext)
+        prov = "WIKI_DISCOGRAPHY_AUDIT" if sales_units > 0 else "UNAUDITED"
+    else:
+        sales_units, awards = 0.0, 0
+        prov = "UNAUDITED"
+    return (aid, sales_units, awards, prov, 99999, sales_units, 0.0, 0.0, 0.0)
+
+def run_fast_ingestion(limit=3000):
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    cur = conn.cursor()
+
+    rows = cur.execute("""
+        SELECT a.artist_id, a.artist_name 
+        FROM artists a
+        LEFT JOIN commercial_sales cs ON a.artist_id = cs.artist_id
+        WHERE cs.sales_id IS NULL
+        LIMIT ?
+    """, (limit,)).fetchall()
+    
+    total = len(rows)
+    if total == 0:
+        print("✓ All catalog artists already ingested.")
+        conn.close()
+        return
+
+    print(f"🚀 Starting high-speed ingestion for {total} artists with {MAX_WORKERS} concurrent threads...")
+    start_time = time.time()
+
+    insert_sql = """
+        INSERT INTO commercial_sales (
+            artist_id, audited_sales_units, awards_count, provenance_flag,
+            sales_rank, pure_album_sales, physical_singles_sales,
+            digital_singles_sales, streaming_eas
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+    """
+
+    completed = 0
+    buffer = []
+
+    with ThreadPoolExecutor(max_workers=MAX_WORKERS) as executor:
+        futures = {executor.submit(process_single_artist, dict(r)): r for r in rows}
+        for future in as_completed(futures):
+            try:
+                record = future.result()
+                buffer.append(record)
+                completed += 1
+
+                if len(buffer) >= 50:
+                    with db_lock:
+                        cur.executemany(insert_sql, buffer)
+                        conn.commit()
+                    elapsed = time.time() - start_time
+                    rate = round(completed / elapsed, 1)
+                    print(f"  ⚡ Ingested {completed}/{total} | {rate} artists/sec | Elapsed: {int(elapsed)}s")
+                    buffer.clear()
+
+            except Exception as e:
+                pass
+
+        if buffer:
+            with db_lock:
+                cur.executemany(insert_sql, buffer)
+                conn.commit()
+
+    conn.close()
+    total_time = round(time.time() - start_time, 1)
+    print(f"✓ Fast batch complete: {completed} artists processed in {total_time}s.")
+
+if __name__ == "__main__":
+    import sys
+    count = int(sys.argv[1]) if len(sys.argv) > 1 else 3000
+    run_fast_ingestion(count)
diff --git a/scripts/resolve_missing_platform_urls.py b/scripts/resolve_missing_platform_urls.py
index 2a97cc1..5f5c547 100644
--- a/scripts/resolve_missing_platform_urls.py
+++ b/scripts/resolve_missing_platform_urls.py
@@ -113,6 +113,7 @@ def main():
     print(f"Valid Instagram URLs : {tally[3]} / 500")
     print("=" * 65)
 
+
     conn.close()
 
 if __name__ == "__main__":
diff --git a/scripts/run_sales_ingestion_17k.py b/scripts/run_sales_ingestion_17k.py
new file mode 100644
index 0000000..cfc3c04
--- /dev/null
+++ b/scripts/run_sales_ingestion_17k.py
@@ -0,0 +1,215 @@
+"""
+scripts/run_sales_ingestion_17k.py
+Automated ingestion of pure commercial sales and certifications across the 17K catalog.
+Directly updates `commercial_sales` in data/hiffi_catalog.db.
+"""
+
+import sqlite3
+import json
+import time
+import re
+import urllib.parse
+import urllib.request
+from typing import Dict, Any, Tuple
+
+DB_PATH = "data/hiffi_catalog.db"
+WIKI_API_URL = "https://en.wikipedia.org/w/api.php"
+HEADERS = {"User-Agent": "HIFFI-Artist-Intelligence/1.0 (sri.lekha@superlabs.co)"}
+
+
+def clean_artist_query(name: str) -> str:
+    clean = re.sub(r'[,$\'\"]', ' ', name)
+    return re.sub(r'\s+', ' ', clean).strip()
+
+
+def search_best_discography_title(artist_name: str) -> str:
+    clean_name = clean_artist_query(artist_name)
+    queries = [
+        f"{artist_name} albums discography",
+        f"{clean_name} discography",
+        f"{artist_name} discography",
+        artist_name
+    ]
+    for q in queries:
+        params = {
+            "action": "opensearch",
+            "search": q,
+            "limit": "4",
+            "namespace": "0",
+            "format": "json"
+        }
+        url = f"{WIKI_API_URL}?{urllib.parse.urlencode(params)}"
+        try:
+            req = urllib.request.Request(url, headers=HEADERS)
+            with urllib.request.urlopen(req, timeout=6) as resp:
+                data = json.loads(resp.read().decode("utf-8"))
+                titles = data[1] if len(data) > 1 else []
+                for t in titles:
+                    if "albums discography" in t.lower():
+                        return t
+                for t in titles:
+                    if "discography" in t.lower():
+                        return t
+                if titles and (q == artist_name or q == clean_name):
+                    return titles[0]
+        except Exception:
+            continue
+    return f"{artist_name} discography"
+
+
+def fetch_wiki_content(exact_title: str) -> str:
+    params = {
+        "action": "query",
+        "prop": "revisions",
+        "rvprop": "content",
+        "rvslots": "main",
+        "titles": exact_title,
+        "format": "json",
+        "redirects": "1"
+    }
+    url = f"{WIKI_API_URL}?{urllib.parse.urlencode(params)}"
+    req = urllib.request.Request(url, headers=HEADERS)
+    try:
+        with urllib.request.urlopen(req, timeout=8) as resp:
+            data = json.loads(resp.read().decode("utf-8"))
+            pages = data.get("query", {}).get("pages", {})
+            for page_id, page_data in pages.items():
+                if page_id != "-1":
+                    slots = page_data.get("revisions", [{}])[0].get("slots", {})
+                    return slots.get("main", {}).get("*", "")
+    except Exception:
+        pass
+    return ""
+
+
+def clean_wiki_markup(text: str) -> str:
+    text = re.sub(r'<ref[^>]*>.*?</ref>', '', text, flags=re.DOTALL | re.IGNORECASE)
+    text = re.sub(r'<ref[^/>]*/>', '', text, flags=re.IGNORECASE)
+    text = re.sub(r'\[\[(?:[^|\]]*\|)?([^\]]+)\]\]', r'\1', text)
+    return text
+
+
+def parse_studio_sales(wikitext: str) -> Tuple[float, int]:
+    clean_text = clean_wiki_markup(wikitext)
+    
+    # Matches == Studio albums ==, === Studio albums ===, or Commercial mixtapes
+    match = re.search(
+        r'={2,4}\s*(?:Studio albums|Commercial mixtapes|Albums)\s*={2,4}.*?(?===={2,4}|\Z)',
+        clean_text,
+        re.DOTALL | re.IGNORECASE
+    )
+    album_section = match.group(0) if match else clean_text
+
+    pure_album_sales = 0.0
+    awards_count = 0
+
+    # 1. Reported US Sales Figures
+    sales_matches = re.findall(
+        r'(?:US:\s*|sales:\s*|US sales:\s*)([0-9]{1,3}(?:,[0-9]{3})+)',
+        album_section,
+        re.IGNORECASE
+    )
+    seen_sales = set()
+    for s in sales_matches:
+        num = float(s.replace(",", ""))
+        if 40_000 <= num <= 25_000_000 and num not in seen_sales:
+            pure_album_sales += num
+            seen_sales.add(num)
+
+    # 2. Multi-Platinum RIAA
+    multi_plat = re.findall(r'RIAA[:\s|=]*(\d+)[\xd7x\s]*Platinum', album_section, re.IGNORECASE)
+    for m in multi_plat:
+        mult = float(m)
+        pure_album_sales += mult * 1_000_000
+        awards_count += int(mult)
+
+    # 3. Single Platinum RIAA
+    cleaned_multi = re.sub(r'\d+[\xd7x\s]*Platinum', '', album_section, flags=re.IGNORECASE)
+    single_plat = len(re.findall(r'RIAA[:\s|=]*Platinum', cleaned_multi, re.IGNORECASE))
+    pure_album_sales += single_plat * 1_000_000
+    awards_count += single_plat
+
+    # 4. Gold RIAA
+    gold = len(re.findall(r'RIAA[:\s|=]*Gold', album_section, re.IGNORECASE))
+    pure_album_sales += gold * 500_000
+    awards_count += gold
+
+    # 5. General Platinum fallback if RIAA tag was omitted
+    if pure_album_sales == 0.0 and awards_count == 0:
+        general_multi = re.findall(r'(\d+)[\xd7x]\s*Platinum', album_section, re.IGNORECASE)
+        for m in general_multi[:10]:
+            mult = float(m)
+            pure_album_sales += mult * 1_000_000
+            awards_count += int(mult)
+
+    return pure_album_sales, awards_count
+
+
+def ingest_batch(limit: int = 500):
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    cur = conn.cursor()
+
+    # Query only artists not yet in commercial_sales
+    unprocessed_query = """
+        SELECT a.artist_id, a.artist_name 
+        FROM artists a
+        LEFT JOIN commercial_sales cs ON a.artist_id = cs.artist_id
+        WHERE cs.sales_id IS NULL
+        LIMIT ?
+    """
+    rows = cur.execute(unprocessed_query, (limit,)).fetchall()
+    total_to_process = len(rows)
+
+    if total_to_process == 0:
+        print("✓ All 17,135 artists already exist in commercial_sales table.")
+        conn.close()
+        return
+
+    print(f"[*] Commencing sales ingestion for next batch of {total_to_process} artists...")
+
+    insert_sql = """
+        INSERT INTO commercial_sales (
+            artist_id, audited_sales_units, awards_count, provenance_flag,
+            sales_rank, pure_album_sales, physical_singles_sales,
+            digital_singles_sales, streaming_eas
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+    """
+
+    processed_count = 0
+    for row in rows:
+        aid = row["artist_id"]
+        name = row["artist_name"]
+
+        title = search_best_discography_title(name)
+        wikitext = fetch_wiki_content(title) if title else ""
+        
+        if wikitext:
+            sales_units, awards = parse_studio_sales(wikitext)
+            prov = "WIKI_DISCOGRAPHY_AUDIT" if sales_units > 0 else "UNAUDITED"
+        else:
+            sales_units, awards = 0.0, 0
+            prov = "UNAUDITED"
+
+        # Temporary sales_rank placeholder (recalculated globally afterwards)
+        cur.execute(insert_sql, (
+            aid, sales_units, awards, prov, 99999,
+            sales_units, 0.0, 0.0, 0.0
+        ))
+
+        processed_count += 1
+        if processed_count % 25 == 0:
+            conn.commit()
+            print(f"  -> Ingested {processed_count}/{total_to_process} records...")
+
+        time.sleep(0.15)
+
+    conn.commit()
+    conn.close()
+    print(f"✓ Batch completed. Processed {processed_count} artists.")
+
+
+if __name__ == "__main__":
+    import sys
+    batch_size = int(sys.argv[1]) if len(sys.argv) > 1 else 100
+    ingest_batch(batch_size)
\ No newline at end of file