diff --git a/data.json b/data.json
index 2ea0c01..11719c7 100644
--- a/data.json
+++ b/data.json
@@ -1,7 +1,7 @@
 {
   "metadata": {
     "title": "Bitcoin Developer Quantum Urgency Map",
-    "date": "2026-04-10",
+    "date": "2026-05-11",
     "agent": "Iskander",
     "agent_btc": "bc1qxj5jtv8jwm7zv2nczn2xfq9agjgj0sqpsxn43h",
     "agent_bns": "iskander-ai.btc",
@@ -213,6 +213,27 @@
         "change": "new entry — score 4 (Proactive), pq_work_volume 1; LightStim DEM automation for QEC (arXiv 2604.21472)",
         "pr": "#31",
         "contributor": "@1feems"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "Mark Friedenbach",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep of bitcoin-dev/Delving/BIPs found no new statements; score 3 and existing source confirmed",
+        "pr": "#37",
+        "contributor": "@arc0btc"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "Karl-Johan Alm",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep of bitcoin-dev/Delving/BIPs found no new statements; score 3 confirmed",
+        "pr": "#37",
+        "contributor": "@arc0btc"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "0xB10C",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep confirmed null result; score 1 confirmed, focus on Bitcoin Core/P2P/mining analytics",
+        "pr": "#37",
+        "contributor": "@arc0btc"
       }
     ],
     "last_updated": "2026-05-05",
@@ -817,11 +838,12 @@
       "quantum_urgency_score": 3,
       "pq_work_volume": 0,
       "notable": false,
-      "summary": "Distinguished hash-protected vs exposed-pubkey quantum risk in bitcoin-dev thread. Argued Taproot naked pubkeys give attackers unlimited time vs hashed keys where attacker must race transaction confirmation. Cautious position: recognizes real quantum threat vector in P2TR design.",
+      "summary": "Distinguished hash-protected vs exposed-pubkey quantum risk in bitcoin-dev thread. Argued Taproot naked pubkeys give attackers unlimited time vs hashed keys where attacker must race transaction confirmation. Cautious position: recognizes real quantum threat vector in P2TR design. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin, and BIP activity found no new statements post-2021.",
       "key_source": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-March/018645.html",
       "sources": [
         "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-March/018645.html"
-      ]
+      ],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 45,
@@ -843,11 +865,12 @@
       "quantum_urgency_score": 3,
       "pq_work_volume": 1,
       "notable": false,
-      "summary": "Opposed Taproot activation explicitly over quantum risk. Argued P2TR exposes public keys on-chain, making ~6.25M BTC (1/3 of supply) immediately vulnerable to quantum theft. Called Taproot activation without PQ mitigation irresponsible.",
+      "summary": "Opposed Taproot activation explicitly over quantum risk. Argued P2TR exposes public keys on-chain, making ~6.25M BTC (1/3 of supply) immediately vulnerable to quantum theft. Called Taproot activation without PQ mitigation irresponsible. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin, and BIP activity found no new statements post-2021; source verified active.",
       "key_source": "https://freicoin.substack.com/p/why-im-against-taproot",
       "sources": [
         "https://freicoin.substack.com/p/why-im-against-taproot"
-      ]
+      ],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 47,
@@ -881,9 +904,10 @@
       "quantum_urgency_score": 1,
       "pq_work_volume": 0,
       "notable": false,
-      "summary": "No public statements on quantum risk",
+      "summary": "No public statements on quantum risk. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin (b10c.me), and BIP activity found no quantum-adjacent statements. Focus confirmed as Bitcoin Core dev, P2P network monitoring, and mining pool analysis.",
       "key_source": null,
-      "sources": []
+      "sources": [],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 50,
diff --git a/public/data.json b/public/data.json
index 2ea0c01..11719c7 100644
--- a/public/data.json
+++ b/public/data.json
@@ -1,7 +1,7 @@
 {
   "metadata": {
     "title": "Bitcoin Developer Quantum Urgency Map",
-    "date": "2026-04-10",
+    "date": "2026-05-11",
     "agent": "Iskander",
     "agent_btc": "bc1qxj5jtv8jwm7zv2nczn2xfq9agjgj0sqpsxn43h",
     "agent_bns": "iskander-ai.btc",
@@ -213,6 +213,27 @@
         "change": "new entry — score 4 (Proactive), pq_work_volume 1; LightStim DEM automation for QEC (arXiv 2604.21472)",
         "pr": "#31",
         "contributor": "@1feems"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "Mark Friedenbach",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep of bitcoin-dev/Delving/BIPs found no new statements; score 3 and existing source confirmed",
+        "pr": "#37",
+        "contributor": "@arc0btc"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "Karl-Johan Alm",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep of bitcoin-dev/Delving/BIPs found no new statements; score 3 confirmed",
+        "pr": "#37",
+        "contributor": "@arc0btc"
+      },
+      {
+        "date": "2026-05-11",
+        "developer": "0xB10C",
+        "change": "add last_verified 2026-05-11 — May 2026 sweep confirmed null result; score 1 confirmed, focus on Bitcoin Core/P2P/mining analytics",
+        "pr": "#37",
+        "contributor": "@arc0btc"
       }
     ],
     "last_updated": "2026-05-05",
@@ -817,11 +838,12 @@
       "quantum_urgency_score": 3,
       "pq_work_volume": 0,
       "notable": false,
-      "summary": "Distinguished hash-protected vs exposed-pubkey quantum risk in bitcoin-dev thread. Argued Taproot naked pubkeys give attackers unlimited time vs hashed keys where attacker must race transaction confirmation. Cautious position: recognizes real quantum threat vector in P2TR design.",
+      "summary": "Distinguished hash-protected vs exposed-pubkey quantum risk in bitcoin-dev thread. Argued Taproot naked pubkeys give attackers unlimited time vs hashed keys where attacker must race transaction confirmation. Cautious position: recognizes real quantum threat vector in P2TR design. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin, and BIP activity found no new statements post-2021.",
       "key_source": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-March/018645.html",
       "sources": [
         "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-March/018645.html"
-      ]
+      ],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 45,
@@ -843,11 +865,12 @@
       "quantum_urgency_score": 3,
       "pq_work_volume": 1,
       "notable": false,
-      "summary": "Opposed Taproot activation explicitly over quantum risk. Argued P2TR exposes public keys on-chain, making ~6.25M BTC (1/3 of supply) immediately vulnerable to quantum theft. Called Taproot activation without PQ mitigation irresponsible.",
+      "summary": "Opposed Taproot activation explicitly over quantum risk. Argued P2TR exposes public keys on-chain, making ~6.25M BTC (1/3 of supply) immediately vulnerable to quantum theft. Called Taproot activation without PQ mitigation irresponsible. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin, and BIP activity found no new statements post-2021; source verified active.",
       "key_source": "https://freicoin.substack.com/p/why-im-against-taproot",
       "sources": [
         "https://freicoin.substack.com/p/why-im-against-taproot"
-      ]
+      ],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 47,
@@ -881,9 +904,10 @@
       "quantum_urgency_score": 1,
       "pq_work_volume": 0,
       "notable": false,
-      "summary": "No public statements on quantum risk",
+      "summary": "No public statements on quantum risk. May 2026 sweep of bitcoin-dev (gnusha.org), Delving Bitcoin (b10c.me), and BIP activity found no quantum-adjacent statements. Focus confirmed as Bitcoin Core dev, P2P network monitoring, and mining pool analysis.",
       "key_source": null,
-      "sources": []
+      "sources": [],
+      "last_verified": "2026-05-11"
     },
     {
       "rank": 50,