Publish kind 1 reply announcing confirmed OTS attestation with block height

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr_quantum_preparation",
-  "version": "0.0.36",
+  "version": "0.0.37",
   "description": "A migration strategy for bringing post-quantum security to Nostr without breaking the social graph, without requiring consensus on a single post-quantum algorithm, and without forcing existing users to abandon their identities.",
   "main": "index.js",
   "scripts": {

www/js/index-app.mjs

@@ -16,6 +16,7 @@
       bytesToBase64,
       base64ToBytes,
       bytesToHex,
+      hexToNpub,
       PQ_KEY_INFO,
       NIP_QR_KIND,
       buildUpgradedEvent,
@@ -1308,7 +1309,7 @@
             const saved = loadPendingOts();
             if (!saved || !saved.confirmedPublished) {
               setStatus(document.getElementById('pqOtsStatus'), 'success', 'Bitcoin attestation verified. Publishing new kind 9999 with confirmed proof...');
-              await publishUpgradedEvent(pendingOtsBytes);
+              await publishUpgradedEvent(pendingOtsBytes, att ? att.height : null, att ? att.time : null);
             }
           } else if (isOtsConfirmed(pendingOtsBytes)) {
             // Structural check found a Bitcoin attestation tag but full
@@ -1340,7 +1341,7 @@
       otsPollInterval = setInterval(poll, 60000);
     }
 
-    async function publishUpgradedEvent(upgradedOtsBytes) {
+    async function publishUpgradedEvent(upgradedOtsBytes, bitcoinHeight = null, bitcoinTime = null) {
       const otsStatus = document.getElementById('pqOtsStatus');
       try {
         otsLog('Building upgraded proof carrier with confirmed OTS proof...');
@@ -1375,6 +1376,46 @@
           kind1Event
         });
 
+        // Publish a kind 1 reply announcing the confirmed attestation.
+        // This is a regular Nostr text note (reply to the original kind 1
+        // announcement) so it shows up in feeds/thread views. It only needs
+        // the secp256k1 signature — no PQ signatures.
+        if (kind1Event && kind1Event.id) {
+          try {
+            otsLog('Publishing kind 1 reply announcing confirmed attestation...');
+            const npub = hexToNpub(currentPubkey);
+            const dateStr = bitcoinTime
+              ? new Date(bitcoinTime * 1000).toISOString().substring(0, 19)
+              : 'unknown';
+            const blockStr = bitcoinHeight ? `Bitcoin block ${bitcoinHeight} (mined ${dateStr} UTC)` : 'a Bitcoin block';
+            const replyContent = `✅ The OpenTimestamps proof for my post-quantum key attestation has been confirmed in ${blockStr}. The link between my current Nostr identity and my post-quantum keys is now anchored to the Bitcoin blockchain and cannot be backdated.
+
+Verify it here: https://laantungir.net/quantum-prep/verify.html?npub=${npub}
+
+This is a reply to my original attestation announcement. The confirmed proof is carried in a new kind 9999 event referencing the original.`;
+            const replyTemplate = {
+              kind: 1,
+              content: replyContent,
+              tags: [
+                ['e', kind1Event.id, '', 'root'],
+                ['e', validatedEvent.id, '', 'mention']
+              ],
+              pubkey: currentPubkey,
+              created_at: Math.floor(Date.now() / 1000)
+            };
+            const replySigned = await window.nostr.signEvent(replyTemplate);
+            const replyValidated = validateSignerOutput(replySigned, replyTemplate, currentPubkey);
+            const replyResults = await publishToRelays(replyValidated, relayUrls);
+            const replyOk = replyResults.filter(r => r.success).length;
+            const replyFail = replyResults.filter(r => !r.success).length;
+            otsLog(`Kind 1 reply published. Successful: ${replyOk}; failed: ${replyFail}.`);
+          } catch (replyErr) {
+            // The upgraded proof carrier is already published; a failed reply
+            // is non-fatal — log it but don't fail the whole operation.
+            otsLog(`WARNING: kind 1 reply failed: ${replyErr.message}`);
+          }
+        }
+
         setStatus(otsStatus, 'success', `Upgraded proof carrier published to ${successCount} relays. Timestamping complete.`);
         setStepDone(6);
         setStepActive(7);

www/js/version.json

@@ -1,5 +1,5 @@
 {
-  "VERSION": "v0.0.36",
-  "VERSION_NUMBER": "0.0.36",
-  "BUILD_DATE": "2026-07-27T20:31:02.763Z"
+  "VERSION": "v0.0.37",
+  "VERSION_NUMBER": "0.0.37",
+  "BUILD_DATE": "2026-07-27T21:08:31.939Z"
 }