diff --git a/app/igneum-app/ui/app.js b/app/igneum-app/ui/app.js
index 9173f93ab..f92f4ea53 100644
--- a/app/igneum-app/ui/app.js
+++ b/app/igneum-app/ui/app.js
@@ -722,6 +722,12 @@ var View = (function () {
   // the fleet watts and £ a day: the engine's figures when it carries them, else the UI's own sums
   function fleetWatts(m, cards) { return m && m.watts_total > 0 ? m.watts_total : wattsTotal(cards); }
   function fleetPounds(m, cards, pence) { if (m && m.pounds_per_day > 0) return m.pounds_per_day; return poundsPerDay(fleetWatts(m, cards), pence); }
+  // is a lane key this machine's? The cards' ids are the first 8 hex of each vote key hash; a source may shorten the
+  // hash to another length (the 0.3.16 engine keeps 12), so either prefix of the other counts
+  function isMine(miner, cards) {
+    var m = String(miner || '').replace(/^0x/, '').toLowerCase(); if (!m) return false;
+    return (cards || []).some(function (c) { return (c.ids || []).some(function (id) { id = String(id).replace(/^0x/, '').toLowerCase(); return id && (m.indexOf(id) === 0 || id.indexOf(m) === 0); }); });
+  }
   // the chain scene's note from the reply's source
   function liveNote(reply) {
     if (!reply) return '';
@@ -734,7 +740,7 @@ var View = (function () {
   // the confirmations' words (in place, never a dialog)
   function addressAsk(a) { return 'Pay ' + shortHex(a, 6, 4) + ' from the next block? Mining restarts.'; }
   function trustAsk(on) { return on ? 'Include proofs the node never checked? Devnet only. The node restarts.' : 'Check proofs again? The node restarts.'; }
-  return { PAGES: PAGES, page: page, withCommas: withCommas, compact: compact, rel: rel, ago: ago, shortHex: shortHex, kindWord: kindWord, shownCards: shownCards, present: present, cardTitle: cardTitle, cardRow: cardRow, rowWord: rowWord, tuneWord: tuneWord, tuneEta: tuneEta, tuningCard: tuningCard, poundsPerDay: poundsPerDay, money: money, effOf: effOf, effText: effText, wattsTotal: wattsTotal, noReading: noReading, cells: cells, nextCheck: nextCheck, tunePoint: tunePoint, tunable: tunable, tuneWords: tuneWords, schedule: schedule, GOALS: GOALS, GOAL_NAMES: GOAL_NAMES, goalWords: goalWords, ign: ign, balanceWords: balanceWords, fleetWatts: fleetWatts, fleetPounds: fleetPounds, liveNote: liveNote, toggle: toggle, nodeWords: nodeWords, nodeLine: nodeLine, skewWord: skewWord, peersLine: peersLine, heightLine: heightLine, nextSwitch: nextSwitch, switchLine: switchLine, proveWords: proveWords, verifierWords: verifierWords, proveTier: proveTier, proveLine: proveLine, devFeeText: devFeeText, devFeeLine: devFeeLine, jobsNote: jobsNote, eventLine: eventLine, plainEvent: plainEvent, pill: pill, beforeOf: beforeOf, ember: ember, fleetSaving: fleetSaving, addressAsk: addressAsk, trustAsk: trustAsk };
+  return { PAGES: PAGES, page: page, withCommas: withCommas, compact: compact, rel: rel, ago: ago, shortHex: shortHex, kindWord: kindWord, shownCards: shownCards, present: present, cardTitle: cardTitle, cardRow: cardRow, rowWord: rowWord, tuneWord: tuneWord, tuneEta: tuneEta, tuningCard: tuningCard, poundsPerDay: poundsPerDay, money: money, effOf: effOf, effText: effText, wattsTotal: wattsTotal, noReading: noReading, cells: cells, nextCheck: nextCheck, tunePoint: tunePoint, tunable: tunable, tuneWords: tuneWords, schedule: schedule, GOALS: GOALS, GOAL_NAMES: GOAL_NAMES, goalWords: goalWords, ign: ign, balanceWords: balanceWords, fleetWatts: fleetWatts, fleetPounds: fleetPounds, isMine: isMine, liveNote: liveNote, toggle: toggle, nodeWords: nodeWords, nodeLine: nodeLine, skewWord: skewWord, peersLine: peersLine, heightLine: heightLine, nextSwitch: nextSwitch, switchLine: switchLine, proveWords: proveWords, verifierWords: verifierWords, proveTier: proveTier, proveLine: proveLine, devFeeText: devFeeText, devFeeLine: devFeeLine, jobsNote: jobsNote, eventLine: eventLine, plainEvent: plainEvent, pill: pill, beforeOf: beforeOf, ember: ember, fleetSaving: fleetSaving, addressAsk: addressAsk, trustAsk: trustAsk };
 })();
 /* ---------- Ember Tune: the card row's tuning line (pure; tune-line.test.mjs loads this block) ----------
    One line per card from the card state (src/state.rs, src/ember.rs): running (the phase and the step), tuned
@@ -1344,7 +1350,7 @@ if (typeof document !== 'undefined') (function () {
   function mountDag() {
     if (dag || typeof IgneumDag === 'undefined' || !$('dag-live')) return;
     try {
-      var mine = function (b) { if (!b) return false; if (b.miner === 'you') return true; if (!state) return false; return state.mining.cards.some(function (c) { return (c.ids || []).indexOf(b.miner) >= 0; }); };
+      var mine = function (b) { if (!b) return false; if (b.miner === 'you') return true; if (!state) return false; return View.isMine(b.miner, state.mining.cards); };
       dag = IgneumDag.mount($('dag-live'), { compact: window.innerWidth < 720, window: 120, url: 'api/live', mine: mine, tooltip: $('dag-tip'), chip: $('dag-chip'), pauseButton: $('dag-pause'), onData: function (d) { var n = View.liveNote(d); if (n && dagMode !== 'failed') setText('dag-note', n); }, onState: function (st, why) {
         var live = st === 'live' || st === 'stale';
         if (dagMode !== st) { dagMode = st; setText('dag-state', st === 'live' ? 'live' : st === 'stale' ? 'behind' : st === 'failed' ? 'your blocks only' : 'connecting'); setText('dag-note', st === 'failed' ? 'The full chain view needs the next update. This is the last 10 minutes of your own blocks.' : st === 'stale' ? (why || '') : ''); }
diff --git a/app/igneum-app/ui/view.test.mjs b/app/igneum-app/ui/view.test.mjs
index ff3d6b232..ba1b27025 100644
--- a/app/igneum-app/ui/view.test.mjs
+++ b/app/igneum-app/ui/view.test.mjs
@@ -398,4 +398,10 @@ test('the 0.3.16 engine fields (ember-tune fd03f35): the balance row, the fleet
   assert.equal(V.liveNote({ ok: true, state: { source: 'site' } }), 'From Igneum’s observer. Your blocks are ringed.', 'the 0.3.15 engine carries the source under state');
   assert.equal(V.liveNote({ ok: false, pending: true, source: 'site' }), 'connecting');
   assert.equal(V.liveNote(null), '');
+  const cards = [card({ ids: ['8fafda27', '1b2c3d4e'] })];
+  assert.equal(V.isMine('8fafda27', cards), true, 'the site: 8 hex');
+  assert.equal(V.isMine('8fafda27a9c1', cards), true, 'the 0.3.16 engine: 12 hex, the same key');
+  assert.equal(V.isMine('0x1B2C3D4E', cards), true);
+  assert.equal(V.isMine('deadbeef', cards), false);
+  assert.equal(V.isMine('', cards), false);
 });