diff --git a/NIP.md b/NIP.md
index 8047c4a..11937cc 100644
--- a/NIP.md
+++ b/NIP.md
@@ -2,6 +2,36 @@
 
 This document defines the Nostr event kinds used by the SkateSpots application for managing skateboarding locations, shops, and related content.
 
+## Profile Metadata Extensions (kind 0)
+
+In addition to the standard NIP-01 metadata fields (`name`, `about`, `picture`,
+`banner`, `website`, `nip05`, `lud16`, `bot`), SkateSpots profiles may carry a
+few custom keys inside the kind 0 content JSON. These are optional, ignored by
+other clients, and preserved on edit:
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `noffer` | string | CLINK Offer code (`noffer1…`) — self-custodial Bitcoin tip code. |
+| `bitcoin_silent_payment` | string | Bitcoin Silent Payment address (BIP-352, `sp1…`) — a reusable, private on-chain address. |
+| `sponsors` | string | Freeform highlight of the skater's sponsors / supporters (brands, shops, people). |
+| `cordn` | string | A Cordn (cordn.net) contact URL for private, MLS-encrypted messaging. |
+
+`lud16` (Lightning address) is standard NIP-01 but is also editable directly in
+the SkateSpots profile form for convenience.
+
+Example:
+
+```json
+{
+  "name": "Sk8rBoi",
+  "lud16": "sk8rboi@getalby.com",
+  "bitcoin_silent_payment": "sp1qq...long...",
+  "sponsors": "Independent Trucks, Local Skate Co.",
+  "cordn": "https://cordn.net/u/abc123",
+  "noffer": "noffer1..."
+}
+```
+
 ## Skate Shops (kind 30017)
 
 Skate shops use the NIP-15 marketplace "stall" kind (30017) extended with skateboarding-specific tags. This enables interoperability with existing Nostr marketplace clients.
diff --git a/src/components/EditProfileForm.tsx b/src/components/EditProfileForm.tsx
index 8f01c7d..804f64a 100644
--- a/src/components/EditProfileForm.tsx
+++ b/src/components/EditProfileForm.tsx
@@ -18,11 +18,11 @@ import { Input } from '@/components/ui/input';
 import { Textarea } from '@/components/ui/textarea';
 import { Switch } from '@/components/ui/switch';
 import { Label } from '@/components/ui/label';
-import { Loader2, Upload, Zap, ShieldCheck, AlertCircle } from 'lucide-react';
+import { Loader2, Upload, Zap, ShieldCheck, AlertCircle, Bitcoin, Award, MessageSquareLock } from 'lucide-react';
 import { NSchema as n, type NostrMetadata } from '@nostrify/nostrify';
 import { useQueryClient } from '@tanstack/react-query';
 import { useUploadFile } from '@/hooks/useUploadFile';
-import { isValidNoffer } from '@/lib/types';
+import { isValidNoffer, isValidSilentPayment, isValidLightningAddress } from '@/lib/types';
 
 export const EditProfileForm: React.FC = () => {
   const queryClient = useQueryClient();
@@ -40,6 +40,28 @@ export const EditProfileForm: React.FC = () => {
   const nofferInvalid = nofferTrimmed.length > 0 && !isValidNoffer(nofferTrimmed);
   const nofferValid = isValidNoffer(nofferTrimmed);
 
+  // Lightning address (LUD-16). Part of NostrMetadata but not in the default
+  // form fields, so we manage it here and merge it on save.
+  const [lud16, setLud16] = useState('');
+  const lud16Trimmed = lud16.trim();
+  const lud16Invalid = lud16Trimmed.length > 0 && !isValidLightningAddress(lud16Trimmed);
+
+  // Bitcoin Silent Payment address (BIP-352). Custom kind-0 field.
+  const [silentPayment, setSilentPayment] = useState('');
+  const spTrimmed = silentPayment.trim();
+  const spInvalid = spTrimmed.length > 0 && !isValidSilentPayment(spTrimmed);
+  const spValid = isValidSilentPayment(spTrimmed);
+
+  // Sponsorships — freeform highlight (custom kind-0 field `sponsors`).
+  const [sponsors, setSponsors] = useState('');
+
+  // Cordn contact link — private (MLS-encrypted) group messaging you can own.
+  // A URL others can use to reach out to you on Cordn (cordn.net).
+  const [cordn, setCordn] = useState('');
+  const cordnTrimmed = cordn.trim();
+  const cordnInvalid =
+    cordnTrimmed.length > 0 && !/^https?:\/\/.+/i.test(cordnTrimmed);
+
   // Initialize the form with default values
   const form = useForm<NostrMetadata>({
     resolver: zodResolver(n.metadata()),
@@ -66,11 +88,13 @@ export const EditProfileForm: React.FC = () => {
         nip05: metadata.nip05 || '',
         bot: metadata.bot || false,
       });
-      // Prefill the custom CLINK code from the raw metadata.
-      const existingNoffer = (metadata as Record<string, unknown>).noffer;
-      if (typeof existingNoffer === 'string') {
-        setNoffer(existingNoffer);
-      }
+      // Prefill custom / extra fields from the raw metadata.
+      const raw = metadata as Record<string, unknown>;
+      if (typeof raw.noffer === 'string') setNoffer(raw.noffer);
+      if (typeof metadata.lud16 === 'string') setLud16(metadata.lud16);
+      if (typeof raw.bitcoin_silent_payment === 'string') setSilentPayment(raw.bitcoin_silent_payment);
+      if (typeof raw.sponsors === 'string') setSponsors(raw.sponsors);
+      if (typeof raw.cordn === 'string') setCordn(raw.cordn);
     }
   }, [metadata, form]);
 
@@ -113,6 +137,33 @@ export const EditProfileForm: React.FC = () => {
       return;
     }
 
+    if (lud16Invalid) {
+      toast({
+        title: 'Invalid Lightning address',
+        description: 'Use an email-like address such as you@walletofsatoshi.com.',
+        variant: 'destructive',
+      });
+      return;
+    }
+
+    if (spInvalid) {
+      toast({
+        title: 'Invalid Silent Payment address',
+        description: 'A Silent Payment address starts with "sp1" and is quite long. Clear it or paste a valid one.',
+        variant: 'destructive',
+      });
+      return;
+    }
+
+    if (cordnInvalid) {
+      toast({
+        title: 'Invalid Cordn link',
+        description: 'Paste a full https://… Cordn contact link.',
+        variant: 'destructive',
+      });
+      return;
+    }
+
     try {
       // Combine existing metadata with new values
       const data: Record<string, unknown> = { ...metadata, ...values };
@@ -131,6 +182,34 @@ export const EditProfileForm: React.FC = () => {
         delete data.noffer;
       }
 
+      // Lightning address (LUD-16).
+      if (lud16Trimmed) {
+        data.lud16 = lud16Trimmed;
+      } else {
+        delete data.lud16;
+      }
+
+      // Bitcoin Silent Payment address (custom field).
+      if (spValid) {
+        data.bitcoin_silent_payment = spTrimmed;
+      } else {
+        delete data.bitcoin_silent_payment;
+      }
+
+      // Sponsorships highlight (custom field).
+      if (sponsors.trim()) {
+        data.sponsors = sponsors.trim();
+      } else {
+        delete data.sponsors;
+      }
+
+      // Cordn contact link (custom field).
+      if (cordnTrimmed) {
+        data.cordn = cordnTrimmed;
+      } else {
+        delete data.cordn;
+      }
+
       // Publish the metadata event (kind 0) with retry logic
       let attempts = 0;
       let lastError;
@@ -329,6 +408,113 @@ href="https://clinkme.dev/specs.html"
           )}
         </div>
 
+        {/* Lightning address (LUD-16) */}
+        <div className="space-y-2 rounded-lg border border-yellow-500/30 bg-yellow-500/5 p-4">
+          <Label htmlFor="profile-lud16" className="flex items-center gap-2 text-yellow-600 dark:text-yellow-400">
+            <Zap className="h-4 w-4" />
+            Bitcoin Lightning Address <span className="text-xs font-normal text-muted-foreground">(optional)</span>
+          </Label>
+          <Input
+            id="profile-lud16"
+            placeholder="you@walletofsatoshi.com"
+            value={lud16}
+            onChange={(e) => setLud16(e.target.value)}
+            spellCheck={false}
+            autoCapitalize="none"
+            className="font-mono text-sm"
+          />
+          {lud16Invalid ? (
+            <p className="flex items-center gap-1.5 text-xs text-red-500">
+              <AlertCircle className="h-3.5 w-3.5 shrink-0" />
+              Use an email-like address such as <code className="mx-1">you@getalby.com</code>.
+            </p>
+          ) : (
+            <p className="text-xs text-muted-foreground">
+              Your Lightning address lets anyone zap you instantly. Powers the "Zap" button on your profile.
+            </p>
+          )}
+        </div>
+
+        {/* Bitcoin Silent Payment address (BIP-352) */}
+        <div className="space-y-2 rounded-lg border border-orange-500/30 bg-orange-500/5 p-4">
+          <Label htmlFor="profile-sp" className="flex items-center gap-2 text-orange-600 dark:text-orange-400">
+            <Bitcoin className="h-4 w-4" />
+            Bitcoin Silent Payment Address <span className="text-xs font-normal text-muted-foreground">(optional)</span>
+          </Label>
+          <Input
+            id="profile-sp"
+            placeholder="sp1q..."
+            value={silentPayment}
+            onChange={(e) => setSilentPayment(e.target.value)}
+            spellCheck={false}
+            autoCapitalize="none"
+            className="font-mono text-sm"
+          />
+          {spInvalid ? (
+            <p className="flex items-center gap-1.5 text-xs text-red-500">
+              <AlertCircle className="h-3.5 w-3.5 shrink-0" />
+              A Silent Payment address starts with <code className="mx-1">sp1</code> and is quite long.
+            </p>
+          ) : spValid ? (
+            <p className="flex items-center gap-1.5 text-xs text-green-600 dark:text-green-400">
+              <ShieldCheck className="h-3.5 w-3.5 shrink-0" />
+              Valid — a reusable, private on-chain address others can pay repeatedly.
+            </p>
+          ) : (
+            <p className="text-xs text-muted-foreground">
+              A reusable static on-chain address (BIP-352). Share once; every payment lands at a fresh, unlinkable output.
+            </p>
+          )}
+        </div>
+
+        {/* Sponsorships */}
+        <div className="space-y-2 rounded-lg border border-pink-500/30 bg-pink-500/5 p-4">
+          <Label htmlFor="profile-sponsors" className="flex items-center gap-2 text-pink-600 dark:text-pink-400">
+            <Award className="h-4 w-4" />
+            Sponsors & Support <span className="text-xs font-normal text-muted-foreground">(optional)</span>
+          </Label>
+          <Textarea
+            id="profile-sponsors"
+            placeholder="Flow, Independent Trucks, your local shop… whoever backs your skating."
+            value={sponsors}
+            onChange={(e) => setSponsors(e.target.value)}
+            className="resize-none text-sm"
+            rows={2}
+          />
+          <p className="text-xs text-muted-foreground">
+            Highlight the brands, shops or people who sponsor or support you. Shown on your profile.
+          </p>
+        </div>
+
+        {/* Cordn contact link */}
+        <div className="space-y-2 rounded-lg border border-teal-500/30 bg-teal-500/5 p-4">
+          <Label htmlFor="profile-cordn" className="flex items-center gap-2 text-teal-600 dark:text-teal-400">
+            <MessageSquareLock className="h-4 w-4" />
+            Cordn Contact Link <span className="text-xs font-normal text-muted-foreground">(optional)</span>
+          </Label>
+          <Input
+            id="profile-cordn"
+            placeholder="https://cordn.net/..."
+            value={cordn}
+            onChange={(e) => setCordn(e.target.value)}
+            spellCheck={false}
+            autoCapitalize="none"
+            className="font-mono text-sm"
+          />
+          {cordnInvalid ? (
+            <p className="flex items-center gap-1.5 text-xs text-red-500">
+              <AlertCircle className="h-3.5 w-3.5 shrink-0" />
+              Paste a full link starting with <code className="mx-1">https://</code>.
+            </p>
+          ) : (
+            <p className="text-xs text-muted-foreground">
+              A link others can use to reach you on{' '}
+              <a href="https://cordn.net" target="_blank" rel="noopener noreferrer" className="text-teal-500 underline hover:text-teal-400">Cordn</a>
+              {' '}— private, encrypted group messaging you own.
+            </p>
+          )}
+        </div>
+
         <FormField
           control={form.control}
           name="bot"
diff --git a/src/lib/types.ts b/src/lib/types.ts
index 15ac5c3..e5c75f6 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -267,6 +267,27 @@ export function isValidNoffer(value: string | undefined | null): value is string
   return /^noffer1[023456789acdefghjklmnpqrstuvwxyz]{20,}$/.test(value.trim().toLowerCase());
 }
 
+/**
+ * Validate a Bitcoin Silent Payment address (BIP-352). Mainnet addresses use
+ * the `sp1` human-readable prefix and are bech32m-encoded (~116 chars for the
+ * standard 66-byte payload). We validate the prefix + charset + rough length;
+ * the app does not derive outputs — it displays the address for others to pay.
+ */
+export function isValidSilentPayment(value: string | undefined | null): value is string {
+  if (!value) return false;
+  const v = value.trim().toLowerCase();
+  // sp1 (mainnet) or tsp1 (testnet), followed by bech32 charset, long payload.
+  return /^(t?sp)1[023456789acdefghjklmnpqrstuvwxyz]{100,}$/.test(v);
+}
+
+/**
+ * Validate a Lightning address (LUD-16 / lud16) — an email-like `user@domain`.
+ */
+export function isValidLightningAddress(value: string | undefined | null): value is string {
+  if (!value) return false;
+  return /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$/i.test(value.trim());
+}
+
 export interface SkateSpot {
   id: string;
   pubkey: string;
diff --git a/src/pages/NIP19Page.tsx b/src/pages/NIP19Page.tsx
index d18156e..88a233e 100644
--- a/src/pages/NIP19Page.tsx
+++ b/src/pages/NIP19Page.tsx
@@ -35,6 +35,9 @@ import {
   Package,
   Tag,
   ArrowRightLeft,
+  Bitcoin,
+  Award,
+  MessageSquareLock,
 } from 'lucide-react';
 import { useState } from 'react';
 import { UserStatusIndicator } from '@/components/UserStatusIndicator';
@@ -58,8 +61,14 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
   const lud16 = metadata?.lud16;
   const isBot = metadata?.bot === true;
   // Custom CLINK offer code stored in the kind 0 content JSON.
-  const noffer = (metadata as Record<string, unknown> | undefined)?.noffer;
+  const raw = metadata as Record<string, unknown> | undefined;
+  const noffer = raw?.noffer;
   const nofferCode = typeof noffer === 'string' ? noffer : undefined;
+  // Extra custom profile fields.
+  const silentPayment = typeof raw?.bitcoin_silent_payment === 'string' ? raw.bitcoin_silent_payment : undefined;
+  const sponsors = typeof raw?.sponsors === 'string' ? raw.sponsors.trim() : undefined;
+  const cordnUrl = typeof raw?.cordn === 'string' ? raw.cordn : undefined;
+  const [spCopied, setSpCopied] = useState(false);
 
   const npub = nip19.npubEncode(pubkey);
   const isOwnProfile = user?.pubkey === pubkey;
@@ -406,11 +415,58 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
 
                 {lud16 && (
                   <div className="flex items-center gap-3 p-3 rounded-lg bg-gray-900">
-                    <Zap className="h-4 w-4 text-yellow-400" />
-                    <span className="text-gray-300 text-sm truncate">{lud16}</span>
+                    <Zap className="h-4 w-4 text-yellow-400 flex-shrink-0" />
+                    <div className="min-w-0">
+                      <p className="text-[10px] uppercase tracking-wide text-gray-500 font-bold">Lightning</p>
+                      <span className="text-gray-300 text-sm truncate block">{lud16}</span>
+                    </div>
                   </div>
                 )}
 
+                {/* Bitcoin Silent Payment address — copyable */}
+                {silentPayment && (
+                  <button
+                    onClick={() => {
+                      navigator.clipboard.writeText(silentPayment);
+                      setSpCopied(true);
+                      setTimeout(() => setSpCopied(false), 2000);
+                    }}
+                    className="flex items-center gap-3 p-3 rounded-lg bg-gray-900 hover:bg-gray-800 transition-colors w-full text-left"
+                  >
+                    <Bitcoin className="h-4 w-4 text-orange-400 flex-shrink-0" />
+                    <div className="min-w-0 flex-1">
+                      <p className="text-[10px] uppercase tracking-wide text-gray-500 font-bold">
+                        Silent Payment {spCopied && <span className="text-green-400">· Copied!</span>}
+                      </p>
+                      <span className="text-gray-300 text-sm truncate block font-mono">
+                        {silentPayment.slice(0, 14)}…{silentPayment.slice(-6)}
+                      </span>
+                    </div>
+                    {spCopied ? (
+                      <Check className="h-3.5 w-3.5 text-green-400 flex-shrink-0" />
+                    ) : (
+                      <Copy className="h-3.5 w-3.5 text-gray-500 flex-shrink-0" />
+                    )}
+                  </button>
+                )}
+
+                {/* Cordn contact link */}
+                {cordnUrl && (
+                  <a
+                    href={cordnUrl}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="flex items-center gap-3 p-3 rounded-lg bg-gray-900 hover:bg-gray-800 transition-colors"
+                  >
+                    <MessageSquareLock className="h-4 w-4 text-teal-400 flex-shrink-0" />
+                    <div className="min-w-0">
+                      <p className="text-[10px] uppercase tracking-wide text-gray-500 font-bold">Cordn</p>
+                      <span className="text-gray-300 text-sm truncate block">Message privately</span>
+                    </div>
+                    <ExternalLink className="h-3 w-3 text-gray-500 ml-auto flex-shrink-0" />
+                  </a>
+                )}
+
                 {/* Npub Copy */}
                 <button
                   onClick={handleCopyNpub}
@@ -428,6 +484,23 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
               </CardContent>
             </Card>
 
+            {/* Sponsors Card */}
+            {sponsors && (
+              <Card className="bg-gradient-to-br from-pink-500/10 to-transparent border-2 border-pink-500/30">
+                <CardHeader className="pb-3">
+                  <CardTitle className="text-lg flex items-center gap-2">
+                    <Award className="h-5 w-5 text-pink-400" />
+                    Sponsors & Support
+                  </CardTitle>
+                </CardHeader>
+                <CardContent>
+                  <p className="text-sm text-gray-300 whitespace-pre-wrap break-words [overflow-wrap:anywhere]">
+                    {sponsors}
+                  </p>
+                </CardContent>
+              </Card>
+            )}
+
             {/* Crews Card */}
             {(crewsLoading || crews.length > 0) && (
               <Card className="bg-black/90 border-2 border-teal-500/30">