diff --git a/apps/contract-verification/src/app/app.tsx b/apps/contract-verification/src/app/app.tsx
index 44d812ae68..3fcee010ea 100644
--- a/apps/contract-verification/src/app/app.tsx
+++ b/apps/contract-verification/src/app/app.tsx
@@ -22,6 +22,7 @@ const App = () => {
   const [submittedContracts, setSubmittedContracts] = useLocalStorage<SubmittedContracts>('contract-verification:submitted-contracts', {})
   const [chains, setChains] = useState<Chain[]>([]) // State to hold the chains data
   const [compilationOutput, setCompilationOutput] = useState<{ [key: string]: CompilerAbstract } | undefined>()
+
   // Form values:
   const [selectedChain, setSelectedChain] = useState<Chain | undefined>()
   const [contractAddress, setContractAddress] = useState('')
diff --git a/apps/contract-verification/src/app/components/SearchableChainDropdown.tsx b/apps/contract-verification/src/app/components/SearchableChainDropdown.tsx
index 5cd834d93a..9ff6474f36 100644
--- a/apps/contract-verification/src/app/components/SearchableChainDropdown.tsx
+++ b/apps/contract-verification/src/app/components/SearchableChainDropdown.tsx
@@ -58,13 +58,14 @@ export const SearchableChainDropdown: React.FC<DropdownProps> = ({ label, id, se
     const handleClickOutside = (event: MouseEvent) => {
       if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
         setIsOpen(false)
+        setSearchTerm(getChainDescriptor(selectedChain))
       }
     }
     document.addEventListener('mousedown', handleClickOutside)
     return () => {
       document.removeEventListener('mousedown', handleClickOutside)
     }
-  }, [])
+  }, [selectedChain])
 
   const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
     setSearchTerm(e.target.value)
diff --git a/apps/contract-verification/src/app/hooks/useSourcifySupported.tsx b/apps/contract-verification/src/app/hooks/useSourcifySupported.tsx
new file mode 100644
index 0000000000..47d4d2437b
--- /dev/null
+++ b/apps/contract-verification/src/app/hooks/useSourcifySupported.tsx
@@ -0,0 +1,33 @@
+import { useEffect, useState } from 'react'
+import { Chain, ChainSettings } from '../types'
+
+export function useSourcifySupported(selectedChain: Chain, chainSettings: ChainSettings): boolean {
+  const [sourcifySupported, setSourcifySupported] = useState(false)
+
+  useEffect(() => {
+    // Unsupported until fetch returns
+    setSourcifySupported(false)
+
+    const sourcifyApi = chainSettings?.verifiers['Sourcify']?.apiUrl
+    if (!sourcifyApi) {
+      return
+    }
+
+    const queriedChainId = selectedChain.chainId
+    const chainsUrl = new URL(sourcifyApi + '/chains')
+
+    fetch(chainsUrl.href, { method: 'GET' })
+      .then((response) => response.json())
+      .then((result: Array<{ chainId: number }>) => {
+        // Makes sure that the selectedChain didn't change while the request is running
+        if (selectedChain.chainId === queriedChainId && result.find((chain) => chain.chainId === queriedChainId)) {
+          setSourcifySupported(true)
+        }
+      })
+      .catch((error) => {
+        console.error('Failed to fetch chains.json:', error)
+      })
+  }, [selectedChain, chainSettings])
+
+  return sourcifySupported
+}
diff --git a/apps/contract-verification/src/app/views/LookupView.tsx b/apps/contract-verification/src/app/views/LookupView.tsx
index b203e575a8..7483ec8101 100644
--- a/apps/contract-verification/src/app/views/LookupView.tsx
+++ b/apps/contract-verification/src/app/views/LookupView.tsx
@@ -1,13 +1,14 @@
-import { useContext, useEffect, useState } from 'react'
+import { useContext, useEffect, useMemo, useState } from 'react'
 import { SearchableChainDropdown, ContractAddressInput } from '../components'
 import { mergeChainSettingsWithDefaults, validConfiguration } from '../utils'
-import type { LookupResponse, VerifierIdentifier, Chain } from '../types'
+import type { LookupResponse, VerifierIdentifier } from '../types'
 import { VERIFIERS } from '../types'
 import { AppContext } from '../AppContext'
 import { CustomTooltip } from '@remix-ui/helper'
 import { getVerifier } from '../Verifiers'
 import { useNavigate } from 'react-router-dom'
 import { VerifyFormContext } from '../VerifyFormContext'
+import { useSourcifySupported } from '../hooks/useSourcifySupported'
 
 export const LookupView = () => {
   const { settings, clientInstance } = useContext(AppContext)
@@ -18,7 +19,9 @@ export const LookupView = () => {
   const [lookupResults, setLookupResult] = useState<Partial<Record<VerifierIdentifier, LookupResponse>>>({})
   const navigate = useNavigate()
 
-  const chainSettings = selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined
+  const chainSettings = useMemo(() => (selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined), [selectedChain, settings])
+
+  const sourcifySupported = useSourcifySupported(selectedChain, chainSettings)
 
   const submitDisabled = !!contractAddressError || !contractAddress || !selectedChain
 
@@ -37,7 +40,7 @@ export const LookupView = () => {
     e.preventDefault()
 
     for (const verifierId of VERIFIERS) {
-      if (!validConfiguration(chainSettings, verifierId)) {
+      if (!validConfiguration(chainSettings, verifierId) || (verifierId === 'Sourcify' && !sourcifySupported)) {
         continue
       }
 
@@ -100,6 +103,21 @@ export const LookupView = () => {
               )
             }
 
+            if (verifierId === 'Sourcify' && !sourcifySupported) {
+              return (
+                <div key={verifierId} className="pt-4">
+                  <div>
+                    <span className="font-weight-bold text-secondary">{verifierId}</span>{' '}
+                    <CustomTooltip tooltipText={`The configured Sourcify server (${chainSettings.verifiers['Sourcify'].apiUrl}) does not support chain ${selectedChain?.chainId}`}>
+                      <span className="text-secondary w-auto" style={{ textDecoration: 'underline dotted', cursor: 'pointer' }} onClick={() => navigate('/settings')}>
+                        Unsupported
+                      </span>
+                    </CustomTooltip>
+                  </div>
+                </div>
+              )
+            }
+
             return (
               <div key={verifierId} className="pt-4">
                 <div>
diff --git a/apps/contract-verification/src/app/views/SettingsView.tsx b/apps/contract-verification/src/app/views/SettingsView.tsx
index df606b31d3..6f0146461f 100644
--- a/apps/contract-verification/src/app/views/SettingsView.tsx
+++ b/apps/contract-verification/src/app/views/SettingsView.tsx
@@ -1,6 +1,6 @@
-import { useContext, useState } from 'react'
+import { useContext, useMemo, useState } from 'react'
 import { SearchableChainDropdown, ConfigInput } from '../components'
-import type { VerifierIdentifier, Chain, VerifierSettings, ContractVerificationSettings } from '../types'
+import type { VerifierIdentifier, VerifierSettings, ContractVerificationSettings } from '../types'
 import { mergeChainSettingsWithDefaults } from '../utils'
 import { AppContext } from '../AppContext'
 import { VerifyFormContext } from '../VerifyFormContext'
@@ -9,7 +9,7 @@ export const SettingsView = () => {
   const { settings, setSettings } = useContext(AppContext)
   const { selectedChain, setSelectedChain } = useContext(VerifyFormContext)
 
-  const chainSettings = selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined
+  const chainSettings = useMemo(() => (selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined), [selectedChain, settings])
 
   const handleChange = (verifier: VerifierIdentifier, key: keyof VerifierSettings, value: string) => {
     const chainId = selectedChain.chainId.toString()
diff --git a/apps/contract-verification/src/app/views/VerifyView.tsx b/apps/contract-verification/src/app/views/VerifyView.tsx
index 8196287fdb..2539a5f4c7 100644
--- a/apps/contract-verification/src/app/views/VerifyView.tsx
+++ b/apps/contract-verification/src/app/views/VerifyView.tsx
@@ -1,4 +1,4 @@
-import { useContext, useEffect, useState } from 'react'
+import { useContext, useEffect, useMemo, useState } from 'react'
 
 import { AppContext } from '../AppContext'
 import { SearchableChainDropdown, ContractDropdown, ContractAddressInput } from '../components'
@@ -10,6 +10,7 @@ import { ConstructorArguments } from '../components/ConstructorArguments'
 import { CustomTooltip } from '@remix-ui/helper'
 import { AbstractVerifier, getVerifier } from '../Verifiers'
 import { VerifyFormContext } from '../VerifyFormContext'
+import { useSourcifySupported } from '../hooks/useSourcifySupported'
 
 export const VerifyView = () => {
   const { compilationOutput, setSubmittedContracts, settings } = useContext(AppContext)
@@ -18,7 +19,9 @@ export const VerifyView = () => {
   const [hasProxy, setHasProxy] = useState(!!proxyAddress)
   const navigate = useNavigate()
 
-  const chainSettings = selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined
+  const chainSettings = useMemo(() => (selectedChain ? mergeChainSettingsWithDefaults(selectedChain.chainId.toString(), settings) : undefined), [selectedChain, settings])
+
+  const sourcifySupported = useSourcifySupported(selectedChain, chainSettings)
 
   const submitDisabled = !!contractAddressError || !contractAddress || !selectedChain || !selectedContract || (hasProxy && !!proxyAddressError) || (hasProxy && !proxyAddress)
 
@@ -26,12 +29,12 @@ export const VerifyView = () => {
   useEffect(() => {
     const changedEnabledVerifiers = {}
     for (const verifierId of VERIFIERS) {
-      if (validConfiguration(chainSettings, verifierId)) {
+      if (validConfiguration(chainSettings, verifierId) && (verifierId !== 'Sourcify' || sourcifySupported)) {
         changedEnabledVerifiers[verifierId] = true
       }
     }
     setEnabledVerifiers(changedEnabledVerifiers)
-  }, [selectedChain])
+  }, [selectedChain, sourcifySupported])
 
   const handleVerifierCheckboxClick = (verifierId: VerifierIdentifier, checked: boolean) => {
     setEnabledVerifiers({ ...enabledVerifiers, [verifierId]: checked })
@@ -174,24 +177,32 @@ export const VerifyView = () => {
       <div className="pt-3">
         Verify on:
         {VERIFIERS.map((verifierId) => {
+          const disabledVerifier = !chainSettings || !validConfiguration(chainSettings, verifierId) || (verifierId === 'Sourcify' && !sourcifySupported)
+
           return (
             <div key={verifierId} className="pt-2 form-check">
-              <input className="form-check-input" type="checkbox" id={`verifier-${verifierId}`} checked={!!enabledVerifiers[verifierId]} onChange={(e) => handleVerifierCheckboxClick(verifierId, e.target.checked)} disabled={!chainSettings || !validConfiguration(chainSettings, verifierId)} />
+              <input className="form-check-input" type="checkbox" id={`verifier-${verifierId}`} checked={!!enabledVerifiers[verifierId]} onChange={(e) => handleVerifierCheckboxClick(verifierId, e.target.checked)} disabled={disabledVerifier} />
 
               <div className="d-flex flex-column align-items-start">
-                <label htmlFor={`verifier-${verifierId}`} style={{ fontSize: '1rem', lineHeight: '1.5', color: 'var(--text)' }} className={`mb-0 font-weight-bold${!chainSettings || validConfiguration(chainSettings, verifierId) ? '' : ' text-secondary'}`}>
+                <label htmlFor={`verifier-${verifierId}`} style={{ fontSize: '1rem', lineHeight: '1.5', color: 'var(--text)' }} className={`mb-0 font-weight-bold${!disabledVerifier ? '' : ' text-secondary'}`}>
                   {verifierId}
                 </label>
                 {!chainSettings ? (
                   ''
-                ) : validConfiguration(chainSettings, verifierId) ? (
-                  <span className="text-secondary">{chainSettings.verifiers[verifierId].apiUrl}</span>
-                ) : (
+                ) : !validConfiguration(chainSettings, verifierId) ? (
                   <CustomTooltip tooltipText="Configure the API in the settings">
                     <span className="text-secondary w-auto" style={{ textDecoration: 'underline dotted', cursor: 'pointer' }} onClick={() => navigate('/settings')}>
                       Enable?
                     </span>
                   </CustomTooltip>
+                ) : verifierId === 'Sourcify' && !sourcifySupported ? (
+                  <CustomTooltip tooltipText={`The configured Sourcify server (${chainSettings.verifiers['Sourcify'].apiUrl}) does not support chain ${selectedChain?.chainId}`}>
+                    <span className="text-secondary w-auto" style={{ textDecoration: 'underline dotted', cursor: 'pointer' }} onClick={() => navigate('/settings')}>
+                      Unsupported
+                    </span>
+                  </CustomTooltip>
+                ) : (
+                  <span className="text-secondary">{chainSettings.verifiers[verifierId].apiUrl}</span>
                 )}
               </div>
             </div>