diff --git a/apps/contract-verification/src/app/Receipts/SourcifyReceipt.tsx b/apps/contract-verification/src/app/Receipts/SourcifyReceipt.tsx
index 066544c099..96bfa8e751 100644
--- a/apps/contract-verification/src/app/Receipts/SourcifyReceipt.tsx
+++ b/apps/contract-verification/src/app/Receipts/SourcifyReceipt.tsx
@@ -1,11 +1,11 @@
 import React, { useState, useEffect } from 'react'
 import { SourcifyVerifier } from '../Verifiers/SourcifyVerifier'
-import { SourcifyVerificationStatus } from '../types/VerificationTypes'
+// import { SourcifyVerificationStatus } from '../types/VerificationTypes'
 import { ReceiptProps } from './props'
 
 // A receipt is something to be rendered
 export const SourcifyReceipt: React.FC<ReceiptProps> = ({ verifyPromise, address, chainId, verifier }) => {
-  const [status, setStatus] = useState<SourcifyVerificationStatus | null>(null)
+  const [status, setStatus] = useState< null>(null)
   const [submissionDate] = useState(new Date()) // This will be set once and not change
 
   useEffect(() => {
diff --git a/apps/contract-verification/src/app/Verifiers/AbstractVerifier.ts b/apps/contract-verification/src/app/Verifiers/AbstractVerifier.ts
index 89f5338dd6..1ea58fe9d6 100644
--- a/apps/contract-verification/src/app/Verifiers/AbstractVerifier.ts
+++ b/apps/contract-verification/src/app/Verifiers/AbstractVerifier.ts
@@ -1,5 +1,5 @@
 import { CompilerAbstract } from '@remix-project/remix-solidity'
-import { SubmittedContract, VerificationResponse, VerificationStatus } from '../types/VerificationTypes'
+import { LookupResponse, SubmittedContract, VerificationResponse, VerificationStatus } from '../types/VerificationTypes'
 
 export interface AbstractVerifier {
   checkVerificationStatus?(receiptId: string): Promise<VerificationStatus>
@@ -16,5 +16,5 @@ export abstract class AbstractVerifier {
   }
 
   abstract verify(submittedContract: SubmittedContract, compilerAbstract: CompilerAbstract): Promise<VerificationResponse>
-  abstract lookup(): Promise<any>
+  abstract lookup(contractAddress: string, chainId: string): Promise<LookupResponse>
 }
diff --git a/apps/contract-verification/src/app/Verifiers/EtherscanVerifier.ts b/apps/contract-verification/src/app/Verifiers/EtherscanVerifier.ts
index f477dce6cf..c12fa5b3b1 100644
--- a/apps/contract-verification/src/app/Verifiers/EtherscanVerifier.ts
+++ b/apps/contract-verification/src/app/Verifiers/EtherscanVerifier.ts
@@ -111,7 +111,7 @@ export class EtherscanVerifier extends AbstractVerifier {
       throw new Error(checkStatusResponse.result)
     }
 
-    let status = 'unknown'
+    let status: VerificationStatus = 'unknown'
     if (checkStatusResponse.result === 'Fail - Unable to verify') {
       status = 'failed'
     }
diff --git a/apps/contract-verification/src/app/Verifiers/SourcifyVerifier.ts b/apps/contract-verification/src/app/Verifiers/SourcifyVerifier.ts
index da37ee947a..db6ebde95f 100644
--- a/apps/contract-verification/src/app/Verifiers/SourcifyVerifier.ts
+++ b/apps/contract-verification/src/app/Verifiers/SourcifyVerifier.ts
@@ -1,6 +1,6 @@
 import { CompilerAbstract, SourcesCode } from '@remix-project/remix-solidity'
 import { AbstractVerifier } from './AbstractVerifier'
-import { SubmittedContract, VerificationResponse } from '../types/VerificationTypes'
+import { LookupResponse, SubmittedContract, VerificationResponse, VerificationStatus } from '../types/VerificationTypes'
 
 interface SourcifyVerificationRequest {
   address: string
@@ -26,10 +26,17 @@ interface SourcifyVerificationResponse {
   ]
 }
 
-interface SourcifyVerificationError {
+interface SourcifyErrorResponse {
   error: 'string'
 }
 
+interface SourcifyLookupResponse {
+  address: string
+  // Includes either chainIds or status key
+  chainIds?: Array<{ chainId: string; status: Exclude<SourcifyVerificationStatus, null> }>
+  status?: 'false'
+}
+
 export class SourcifyVerifier extends AbstractVerifier {
   async verify(submittedContract: SubmittedContract, compilerAbstract: CompilerAbstract): Promise<VerificationResponse> {
     const metadataStr = compilerAbstract.data.contracts[submittedContract.filePath][submittedContract.contractName].metadata
@@ -67,7 +74,7 @@ export class SourcifyVerifier extends AbstractVerifier {
     })
 
     if (!response.ok) {
-      const errorResponse: SourcifyVerificationError = await response.json()
+      const errorResponse: SourcifyErrorResponse = await response.json()
       console.error('Error on Sourcify verification at ' + this.apiUrl + '\nStatus: ' + response.status + '\nResponse: ' + JSON.stringify(errorResponse))
       throw new Error(errorResponse.error)
     }
@@ -80,7 +87,7 @@ export class SourcifyVerifier extends AbstractVerifier {
     }
 
     // Map to a user-facing status message
-    let status = 'unknown'
+    let status: VerificationStatus = 'unknown'
     if (verificationResponse.result[0].status === 'perfect') {
       status = 'fully verified'
     } else if (verificationResponse.result[0].status === 'partial') {
@@ -90,12 +97,30 @@ export class SourcifyVerifier extends AbstractVerifier {
     return { status, receiptId: null }
   }
 
-  async lookup(): Promise<any> {
-    // Implement the lookup logic here
-    console.log('Sourcify lookup started')
-    // Placeholder logic for lookup
-    const lookupResult = {} // Replace with actual lookup logic
-    console.log('Sourcify lookup completed')
-    return lookupResult
+  async lookup(contractAddress: string, chainId: string): Promise<LookupResponse> {
+    const url = new URL('check-all-by-addresses', this.apiUrl)
+    url.searchParams.append('addresses', contractAddress)
+    url.searchParams.append('chainIds', chainId)
+
+    const response = await fetch(url.href, { method: 'GET' })
+
+    if (!response.ok) {
+      const errorResponse: SourcifyErrorResponse = await response.json()
+      console.error('Error on Sourcify lookup at ' + this.apiUrl + '\nStatus: ' + response.status + '\nResponse: ' + JSON.stringify(errorResponse))
+      throw new Error(errorResponse.error)
+    }
+
+    const lookupResponse: SourcifyLookupResponse = (await response.json())[0]
+
+    let status: VerificationStatus = 'unknown'
+    if (lookupResponse.status === 'false') {
+      status = 'not verified'
+    } else if (lookupResponse.chainIds?.[0].status === 'perfect') {
+      status = 'fully verified'
+    } else if (lookupResponse.chainIds?.[0].status === 'partial') {
+      status = 'partially verified'
+    }
+
+    return { status }
   }
 }
diff --git a/apps/contract-verification/src/app/types/VerificationTypes.ts b/apps/contract-verification/src/app/types/VerificationTypes.ts
index 81521c4a5c..13c32393fe 100644
--- a/apps/contract-verification/src/app/types/VerificationTypes.ts
+++ b/apps/contract-verification/src/app/types/VerificationTypes.ts
@@ -17,7 +17,7 @@ export interface Chain {
   infoURL?: string
 }
 
-export type VerifierIdentifier = "Sourcify" | "Etherscan" | "Blockscout"
+export type VerifierIdentifier = 'Sourcify' | 'Etherscan' | 'Blockscout'
 
 export interface VerifierSettings {
   apiUrl: string
@@ -68,9 +68,16 @@ export function isContract(contract: SubmittedContract | SubmittedProxyContract)
   return contract.type === 'contract'
 }
 
-export type VerificationStatus = string | 'error' | 'pending'
+type SourcifyStatus = 'fully verified' | 'partially verified'
+type EtherscanStatus = 'verified'
+export type VerificationStatus = SourcifyStatus | EtherscanStatus | 'failed' | 'pending' | 'not verified' | 'unknown'
 
 export interface VerificationResponse {
   status: VerificationStatus
   receiptId: string | null
 }
+
+export interface LookupResponse {
+  status: VerificationStatus
+  lookupUrl?: string // TODO How to construct these? Do we need another config value?
+}
diff --git a/apps/contract-verification/src/app/views/VerifyView.tsx b/apps/contract-verification/src/app/views/VerifyView.tsx
index 9370594294..6471d5eed2 100644
--- a/apps/contract-verification/src/app/views/VerifyView.tsx
+++ b/apps/contract-verification/src/app/views/VerifyView.tsx
@@ -75,7 +75,7 @@ export const VerifyView = () => {
         }
       } catch (e) {
         const err = e as Error
-        receipt.status = 'error'
+        receipt.status = 'failed'
         receipt.message = err.message
       }