diff --git a/index.html b/index.html
index 30d981a..d514640 100644
--- a/index.html
+++ b/index.html
@@ -8,12 +8,22 @@
 <link rel=pgpkey href="https://metacode.biz/.well-known/openpgpkey/hu/gebusffkx9g581i6ch4t3ewgwd6dctmp">
 -->
 <meta name=keyserver content=keys.openpgp.org>
+<meta name=proofs content=/openpgp/proofs.json>
 <style>
     body { line-height: 1.7; max-width: 800px; margin: 0 auto}
     main { margin: 20px; }
     .props { list-style-type: none; margin-left: 0; padding-left: 0; }
     i { padding-right: 5px; }
     .proof { font-size: small; margin-left: 10px; color: #73a6ff }
+    .follow { font-size: small; margin-left: 10px;
+      background-color: #2b90d9;
+      color: white;
+      padding: 3px 6px;
+      border-radius: 3px;
+      border: none;
+      text-decoration: none; }
+    .follow:hover { background-color: #419bdd }
+    .follow:active { box-shadow: inset 0 0 2px #000000;}
     .verification { font-size: small; margin-left: 5px; cursor: pointer }
     summary { cursor: pointer }
     .verified { color: green }
diff --git a/openpgp-key.tsx b/openpgp-key.tsx
index 8fad117..1d4bd39 100644
--- a/openpgp-key.tsx
+++ b/openpgp-key.tsx
@@ -97,7 +97,8 @@ async function loadKeys(keyUrl: string, _keys: any) {
         expirationTime: lastPrimarySig.getExpirationTime()
     }];
 
-    const p = (await (await fetch('proofs.json')).json()).proofs;
+    const proofsUrl = (document.querySelector('meta[name="proofs"]') as HTMLMetaElement).content;
+    const p = (await (await fetch(proofsUrl)).json()).proofs;
     const notations: [string, any][] = lastPrimarySig.notations || [];
     const proofs = notations
         .filter(notation => notation[0] === 'proof@metacode.biz' && typeof notation[1] === 'string')
@@ -147,8 +148,8 @@ async function checkProofs() {
         const checks = JSON.parse(proofLink.dataset.checks || '');
         const url = proofLink.dataset.proofJson || '';
         try {
-            await verify(url, checks);
-            proofLink.textContent = 'verified proof';
+            await verify(await getJson(url), checks);
+            proofLink.textContent = 'verified';
             proofLink.classList.add('verified');
         } catch(e) {
             console.error('Could not verify proof: ' + e);
@@ -180,6 +181,38 @@ async function clickElement(this: any, e: Event) {
         });
         console.log(verified);
         alert('The signature is ' + (verified.signatures[0].valid ? '✅ correct.' : '❌ incorrect.'));
+    } else if (target.classList.contains('follow')) {
+        e.preventDefault();
+        const url = target.dataset.profile;
+        const handle: string = (prompt(`You are going to follow ${url}.\n\nEnter your username@domain to proceed.`) || '');
+        if (!handle) {
+            return;
+        }
+        const parts = handle.split('@');
+        const domain = encodeURIComponent(parts.pop() || '');
+        const username = encodeURIComponent(parts.pop() || '');
+        if (!domain || !username) {
+            alert('Could not recognize account: ' + handle);
+            return;
+        }
+        fetch(`https://${domain}/.well-known/webfinger?resource=acct:${username}@${domain}`, {
+            headers: {
+                accept: 'application/json'
+            }
+        }).then(response => {
+            if (response.ok) {
+                return response.json()
+            }
+            throw new Error('Request failed: ' + response.statusText);
+        }).then(json => {
+            const { template } = json.links.filter((link: any) => link.rel === 'http://ostatus.org/schema/1.0/subscribe')[0];
+            if (!template) {
+                throw new Error('No subscription address.');
+            }
+            location.href = template.replace('{uri}', encodeURIComponent(url) || '');
+        }).catch(e => {
+            alert('Could not complete action: ' + e);
+        });
     }
 }
 
diff --git a/scripts.js b/scripts.js
index 58fda39..a3a1414 100644
--- a/scripts.js
+++ b/scripts.js
@@ -302,6 +302,9 @@ System.register("ui", ["local", "openpgp"], function (exports_5, context_5) {
                             local.createElement("a", { rel: "me noopener nofollow", target: "_blank", href: proof.profile },
                                 local.createElement("i", { class: serviceToClassName(proof.service) }),
                                 proof.username),
+                            proof.service === 'mastodon' ?
+                                local.createElement("a", { rel: "noopener nofollow", href: "#follow", class: "follow", "data-profile": proof.profile }, "follow")
+                                : null,
                             local.createElement("a", { rel: "noopener nofollow", target: "_blank", href: proof.proofUrl, class: "proof", "data-proof-json": proof.proofJson, "data-checks": JSON.stringify(proof.checks) },
                                 local.createElement("i", { class: "fas fa-certificate" }),
                                 "proof")))))),
@@ -446,7 +449,8 @@ System.register("openpgp-key", ["local", "renderer", "verifier", "openpgp", "ui"
                 algorithmInfo: key.primaryKey.getAlgorithmInfo(),
                 expirationTime: lastPrimarySig.getExpirationTime()
             }];
-        const p = (await (await fetch('proofs.json')).json()).proofs;
+        const proofsUrl = document.querySelector('meta[name="proofs"]').content;
+        const p = (await (await fetch(proofsUrl)).json()).proofs;
         const notations = lastPrimarySig.notations || [];
         const proofs = notations
             .filter(notation => notation[0] === 'proof@metacode.biz' && typeof notation[1] === 'string')
@@ -493,7 +497,7 @@ System.register("openpgp-key", ["local", "renderer", "verifier", "openpgp", "ui"
             const url = proofLink.dataset.proofJson || '';
             try {
                 await verifier_2.verify(await verifier_2.getJson(url), checks);
-                proofLink.textContent = 'verified proof';
+                proofLink.textContent = 'verified';
                 proofLink.classList.add('verified');
             }
             catch (e) {
@@ -528,6 +532,39 @@ System.register("openpgp-key", ["local", "renderer", "verifier", "openpgp", "ui"
             console.log(verified);
             alert('The signature is ' + (verified.signatures[0].valid ? '✅ correct.' : '❌ incorrect.'));
         }
+        else if (target.classList.contains('follow')) {
+            e.preventDefault();
+            const url = target.dataset.profile;
+            const handle = (prompt(`You are going to follow ${url}.\n\nEnter your username@domain to proceed.`) || '');
+            if (!handle) {
+                return;
+            }
+            const parts = handle.split('@');
+            const domain = encodeURIComponent(parts.pop() || '');
+            const username = encodeURIComponent(parts.pop() || '');
+            if (!domain || !username) {
+                alert('Could not recognize account: ' + handle);
+                return;
+            }
+            fetch(`https://${domain}/.well-known/webfinger?resource=acct:${username}@${domain}`, {
+                headers: {
+                    accept: 'application/json'
+                }
+            }).then(response => {
+                if (response.ok) {
+                    return response.json();
+                }
+                throw new Error('Request failed: ' + response.statusText);
+            }).then(json => {
+                const { template } = json.links.filter((link) => link.rel === 'http://ostatus.org/schema/1.0/subscribe')[0];
+                if (!template) {
+                    throw new Error('No subscription address.');
+                }
+                location.href = template.replace('{uri}', encodeURIComponent(url) || '');
+            }).catch(e => {
+                alert('Could not complete action: ' + e);
+            });
+        }
     }
     return {
         setters: [
diff --git a/ui.tsx b/ui.tsx
index 127ce52..0ff3dd4 100644
--- a/ui.tsx
+++ b/ui.tsx
@@ -93,6 +93,9 @@ export function renderInfo(keyUrl: string, name: string, emails: string[], profi
         <li>
             <a rel="me noopener nofollow" target="_blank" href={proof.profile}>
             <i class={serviceToClassName(proof.service)}></i>{proof.username}</a>
+            {proof.service === 'mastodon' ?
+            <a rel="noopener nofollow" href="#follow" class="follow" data-profile={proof.profile}>follow</a>
+            : null}
             <a rel="noopener nofollow" target="_blank" href={proof.proofUrl} class="proof" data-proof-json={proof.proofJson} data-checks={JSON.stringify(proof.checks)}>
             <i class="fas fa-certificate"></i>proof</a>
             </li>