diff --git a/package.json b/package.json
index 1c1596be..636268d6 100644
--- a/package.json
+++ b/package.json
@@ -61,6 +61,7 @@
     "@babel/core": "7.18.2",
     "@babel/preset-env": "7.17.12",
     "@babel/preset-typescript": "7.17.12",
+    "@ethersproject/address": "5.6.1",
     "@semantic-release/changelog": "6.0.1",
     "@semantic-release/git": "10.0.1",
     "@types/elliptic": "6.4.14",
diff --git a/src/VerifierAlgorithm.ts b/src/VerifierAlgorithm.ts
index 5c3ae25f..923bf4f1 100644
--- a/src/VerifierAlgorithm.ts
+++ b/src/VerifierAlgorithm.ts
@@ -112,7 +112,7 @@ export function verifyRecoverableES256K(
     const recoveredKey: any = secp256k1.recoverPubKey(hash, <SignatureInput>sigObj, <number>sigObj.recoveryParam)
     const recoveredPublicKeyHex: string = recoveredKey.encode('hex')
     const recoveredCompressedPublicKeyHex: string = recoveredKey.encode('hex', true)
-    const recoveredAddress: string = toEthereumAddress(recoveredPublicKeyHex)
+    const recoveredAddress: string = toEthereumAddress(recoveredPublicKeyHex).toLowerCase()
 
     const signer: VerificationMethod | undefined = authenticators.find((pk: VerificationMethod) => {
       const keyHex = bytesToHex(extractPublicKeyBytes(pk))
diff --git a/src/__tests__/JWT.test.ts b/src/__tests__/JWT.test.ts
index 498d1b44..9883af7d 100644
--- a/src/__tests__/JWT.test.ts
+++ b/src/__tests__/JWT.test.ts
@@ -3,6 +3,7 @@ import { VerificationMethod } from 'did-resolver'
 import { TokenVerifier } from 'jsontokens'
 import MockDate from 'mockdate'
 import { fromString } from 'uint8arrays/from-string'
+import { getAddress } from "@ethersproject/address"
 import {
   createJWS,
   createJWT,
@@ -549,6 +550,29 @@ describe('verifyJWT()', () => {
     return expect(payload).toMatchSnapshot()
   })
 
+  it('handles ES256K-R algorithm with checksum address in blockchainAccountId - github #231', async () => {
+    expect.assertions(1)
+    const verificationMethod = {
+      id: `${did}#keys-1`,
+      type: 'EcdsaSecp256k1RecoveryMethod2020',
+      owner: did,
+      blockchainAccountId: `eip155:1:${getAddress(address)}`,
+    }
+    const ethResolver = {
+      resolve: jest.fn().mockReturnValue({
+        didDocument: {
+          id: did,
+          verificationMethod: [
+            verificationMethod
+          ],
+        },
+      }),
+    }
+    const jwt = await createJWT({ hello: 'world' }, { issuer: aud, signer: recoverySigner, alg: 'ES256K-R' })
+    const result = await verifyJWT(jwt, { resolver: ethResolver })
+    return expect(result.signer).toEqual(verificationMethod)
+  })
+
   it('accepts a valid exp', async () => {
     expect.assertions(1)
     const jwt = await createJWT({ exp: NOW }, { issuer: did, signer })
diff --git a/src/blockchains/index.ts b/src/blockchains/index.ts
index 74377056..94e06a75 100644
--- a/src/blockchains/index.ts
+++ b/src/blockchains/index.ts
@@ -18,7 +18,7 @@ export const verifyBlockchainAccountId = (publicKey: string, blockchainAccountId
       default:
         return false
     }
-    return chain.join(':') === blockchainAccountId
+    return chain.join(':').toLowerCase() === blockchainAccountId.toLowerCase()
   }
   return false
 }
diff --git a/yarn.lock b/yarn.lock
index fae78244..102657e0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1129,6 +1129,54 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
+"@ethersproject/address@5.6.1":
+  version "5.6.1"
+  resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.6.1.tgz#ab57818d9aefee919c5721d28cd31fd95eff413d"
+  integrity sha512-uOgF0kS5MJv9ZvCz7x6T2EXJSzotiybApn4XlOgoTX0xdtyVIJ7pF+6cGPxiEq/dpBiTfMiw7Yc81JcwhSYA0Q==
+  dependencies:
+    "@ethersproject/bignumber" "^5.6.2"
+    "@ethersproject/bytes" "^5.6.1"
+    "@ethersproject/keccak256" "^5.6.1"
+    "@ethersproject/logger" "^5.6.0"
+    "@ethersproject/rlp" "^5.6.1"
+
+"@ethersproject/bignumber@^5.6.2":
+  version "5.6.2"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bignumber/-/bignumber-5.6.2.tgz#72a0717d6163fab44c47bcc82e0c550ac0315d66"
+  integrity sha512-v7+EEUbhGqT3XJ9LMPsKvXYHFc8eHxTowFCG/HgJErmq4XHJ2WR7aeyICg3uTOAQ7Icn0GFHAohXEhxQHq4Ubw==
+  dependencies:
+    "@ethersproject/bytes" "^5.6.1"
+    "@ethersproject/logger" "^5.6.0"
+    bn.js "^5.2.1"
+
+"@ethersproject/bytes@^5.6.1":
+  version "5.6.1"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bytes/-/bytes-5.6.1.tgz#24f916e411f82a8a60412344bf4a813b917eefe7"
+  integrity sha512-NwQt7cKn5+ZE4uDn+X5RAXLp46E1chXoaMmrxAyA0rblpxz8t58lVkrHXoRIn0lz1joQElQ8410GqhTqMOwc6g==
+  dependencies:
+    "@ethersproject/logger" "^5.6.0"
+
+"@ethersproject/keccak256@^5.6.1":
+  version "5.6.1"
+  resolved "https://registry.yarnpkg.com/@ethersproject/keccak256/-/keccak256-5.6.1.tgz#b867167c9b50ba1b1a92bccdd4f2d6bd168a91cc"
+  integrity sha512-bB7DQHCTRDooZZdL3lk9wpL0+XuG3XLGHLh3cePnybsO3V0rdCAOQGpn/0R3aODmnTOOkCATJiD2hnL+5bwthA==
+  dependencies:
+    "@ethersproject/bytes" "^5.6.1"
+    js-sha3 "0.8.0"
+
+"@ethersproject/logger@^5.6.0":
+  version "5.6.0"
+  resolved "https://registry.yarnpkg.com/@ethersproject/logger/-/logger-5.6.0.tgz#d7db1bfcc22fd2e4ab574cba0bb6ad779a9a3e7a"
+  integrity sha512-BiBWllUROH9w+P21RzoxJKzqoqpkyM1pRnEKG69bulE9TSQD8SAIvTQqIMZmmCO8pUNkgLP1wndX1gKghSpBmg==
+
+"@ethersproject/rlp@^5.6.1":
+  version "5.6.1"
+  resolved "https://registry.yarnpkg.com/@ethersproject/rlp/-/rlp-5.6.1.tgz#df8311e6f9f24dcb03d59a2bac457a28a4fe2bd8"
+  integrity sha512-uYjmcZx+DKlFUk7a5/W9aQVaoEC7+1MOBgNtvNg13+RnuUwT4F0zTovC0tmay5SmRslb29V1B7Y5KCri46WhuQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.6.1"
+    "@ethersproject/logger" "^5.6.0"
+
 "@gar/promisify@^1.0.1", "@gar/promisify@^1.1.3":
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/@gar/promisify/-/promisify-1.1.3.tgz#555193ab2e3bb3b6adc3d551c9c030d9e860daf6"
@@ -2819,6 +2867,11 @@ bn.js@^4.11.9:
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
   integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
+bn.js@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.1.tgz#0bc527a6a0d18d0aa8d5b0538ce4a77dccfa7b70"
+  integrity sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==
+
 boolbase@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
@@ -5354,7 +5407,7 @@ jest@28.1.0:
     import-local "^3.0.2"
     jest-cli "^28.1.0"
 
-js-sha3@^0.8.0:
+js-sha3@0.8.0, js-sha3@^0.8.0:
   version "0.8.0"
   resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.8.0.tgz#b9b7a5da73afad7dedd0f8c463954cbde6818840"
   integrity sha512-gF1cRrHhIzNfToc802P800N8PpXS+evLLXfsVpowqmAFR9uwbi89WvXg2QspOmXL8QL86J4T1EpFu+yUkwJY3Q==