diff --git a/packages/did-provider-key/src/SphereonKeyDidProvider.ts b/packages/did-provider-key/src/SphereonKeyDidProvider.ts
index 68ffa7de..0a1773d2 100644
--- a/packages/did-provider-key/src/SphereonKeyDidProvider.ts
+++ b/packages/did-provider-key/src/SphereonKeyDidProvider.ts
@@ -5,7 +5,7 @@ import {
   jwkJcsEncode,
   JwkKeyUse,
   TKeyType,
-  toJwk,
+  toJwk, toRawCompressedHexPublicKey,
 } from '@sphereon/ssi-sdk-ext.key-utils'
 import { IAgentContext, IIdentifier, IKey, IKeyManager, IService } from '@veramo/core'
 import { AbstractIdentifierProvider } from '@veramo/did-manager'
@@ -70,6 +70,9 @@ export class SphereonKeyDidProvider extends AbstractIdentifierProvider {
     )
 
     let methodSpecificId: string | undefined
+
+    // did:key uses compressed pub keys
+    const compressedPublicKeyHex = toRawCompressedHexPublicKey(u8a.fromString(key.publicKeyHex, 'hex'), key.type)
     if (codecName === JWK_JCS_PUB_NAME) {
       const jwk = toJwk(key.publicKeyHex, keyType, { use: JwkKeyUse.Signature, key, noKidThumbprint: true })
       // console.log(`FIXME JWK: ${JSON.stringify(toJwk(privateKeyHex, keyType, { use: JwkKeyUse.Signature, key, isPrivateKey: true }), null, 2)}`)
@@ -78,7 +81,7 @@ export class SphereonKeyDidProvider extends AbstractIdentifierProvider {
       )
     } else if (codecName) {
       methodSpecificId = u8a.toString(
-        Multibase.encode('base58btc', Multicodec.addPrefix(codecName as Multicodec.CodecName, u8a.fromString(key.publicKeyHex, 'hex')))
+        Multibase.encode('base58btc', Multicodec.addPrefix(codecName as Multicodec.CodecName, u8a.fromString(compressedPublicKeyHex, 'hex')))
       )
     } else {
       codecName = keyCodecs[keyType]
@@ -86,7 +89,7 @@ export class SphereonKeyDidProvider extends AbstractIdentifierProvider {
       if (codecName) {
         // methodSpecificId  = bytesToMultibase({bytes: u8a.fromString(key.publicKeyHex, 'hex'), codecName})
         methodSpecificId = u8a
-          .toString(Multibase.encode('base58btc', Multicodec.addPrefix(codecName as Multicodec.CodecName, u8a.fromString(key.publicKeyHex, 'hex'))))
+          .toString(Multibase.encode('base58btc', Multicodec.addPrefix(codecName as Multicodec.CodecName, u8a.fromString(compressedPublicKeyHex, 'hex'))))
           .toString()
       }
     }
diff --git a/packages/key-utils/src/functions.ts b/packages/key-utils/src/functions.ts
index 70add634..69510ef0 100644
--- a/packages/key-utils/src/functions.ts
+++ b/packages/key-utils/src/functions.ts
@@ -491,7 +491,7 @@ export const isRawCompressedPublicKey = (key: Uint8Array): boolean => key.length
 
 export const toRawCompressedHexPublicKey = (rawPublicKey: Uint8Array, keyType: TKeyType): string => {
   if (isRawCompressedPublicKey(rawPublicKey)) {
-    throw new Error('Invalid public key format, an uncompressed raw public key is required as input, not a raw')
+    return hexStringFromUint8Array(rawPublicKey)
   }
 
   if (keyType === 'Secp256k1' || keyType === 'Secp256r1') {
diff --git a/packages/x509-utils/__tests__/functions.test.ts b/packages/x509-utils/__tests__/functions.test.ts
index d7027244..07488857 100644
--- a/packages/x509-utils/__tests__/functions.test.ts
+++ b/packages/x509-utils/__tests__/functions.test.ts
@@ -17,23 +17,25 @@ const sphereonCA =
 
 const sphereonTest =
   '-----BEGIN CERTIFICATE-----\n' +
-  'MIIC1jCCAnygAwIBAgITALtvb+InWBtzJO3mAeQZIUBXbzAKBggqhkjOPQQDAjBa\n' +
-  'MQswCQYDVQQGEwJOTDEkMCIGA1UECgwbU3BoZXJlb24gSW50ZXJuYXRpb25hbCBC\n' +
-  'LlYuMQswCQYDVQQLDAJJVDEYMBYGA1UEAwwPY2Euc3BoZXJlb24uY29tMB4XDTI0\n' +
-  'MDgwNjIwMTYxMloXDTI0MTEwNDIyMTYxMlowJDEiMCAGA1UEAwwZdGVzdDEyMy50\n' +
-  'ZXN0LnNwaGVyZW9uLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABKclR1Ue\n' +
-  'yHYFphv0y29/iv+HYN1wuhkEFgwetS52teZ7OcVNCBD0kMmqEaKjbczwd2GvbV1A\n' +
-  'OxgE7AKsa3L0zxOjggFVMIIBUTAdBgNVHQ4EFgQUoWVOwL15ttB1YPUd0HgvYry0\n' +
-  'Z+UwHwYDVR0jBBgwFoAU5wfKXZVc+cig/s7jZEUegLMsMsEwYQYIKwYBBQUHAQEE\n' +
-  'VTBTMFEGCCsGAQUFBzAChkVodHRwOi8vZXUuY2VydC5lemNhLmlvL2NlcnRzL2Rh\n' +
-  'YTFiNGI0LTg1ZmQtNGJhNC1iOTZiLTMzMmFkZDg5OWNlOS5jZXIwEwYDVR0lBAww\n' +
-  'CgYIKwYBBQUHAwIwJAYDVR0RBB0wG4IZdGVzdDEyMy50ZXN0LnNwaGVyZW9uLmNv\n' +
-  'bTAOBgNVHQ8BAf8EBAMCB4AwYQYDVR0fBFowWDBWoFSgUoZQaHR0cDovL2V1LmNy\n' +
-  'bC5lemNhLmlvL2NybC8yY2RmN2M1ZS1iOWNkLTQzMTctYmI1Ni0zODZkMjQ0Mzgw\n' +
-  'ZTIvY2FzcGhlcmVvbmNvbS5jcmwwCgYIKoZIzj0EAwIDSAAwRQIgThuggyhKePvR\n' +
-  't5YEvfg6MD42N2/63L0ypw0vLZkM+zYCIQD+uInjqsfR6K/D+ebjuOAdhOyeD2nZ\n' +
-  'AW29zN20WIQJsw==\n' +
-  '-----END CERTIFICATE-----'
+    'MIIDSDCCAu6gAwIBAgISK90y2oo7lOTaCgILZPsHpoI1MAoGCCqGSM49BAMCMFox\n' +
+    'CzAJBgNVBAYTAk5MMSQwIgYDVQQKDBtTcGhlcmVvbiBJbnRlcm5hdGlvbmFsIEIu\n' +
+    'Vi4xCzAJBgNVBAsMAklUMRgwFgYDVQQDDA9jYS5zcGhlcmVvbi5jb20wHhcNMjQx\n' +
+    'MTI2MTk0OTMyWhcNMjUwMjI0MjE0OTMyWjCBjjELMAkGA1UEBhMCTkwxFjAUBgNV\n' +
+    'BAgMDU5vb3JkLUhvbGxhbmQxEjAQBgNVBAcMCUFtc3RlcmRhbTEkMCIGA1UECgwb\n' +
+    'U3BoZXJlb24gSW50ZXJuYXRpb25hbCBCLlYuMQswCQYDVQQLDAJJVDEgMB4GA1UE\n' +
+    'AwwXZnVua2UuZGVtby5zcGhlcmVvbi5jb20wWTATBgcqhkjOPQIBBggqhkjOPQMB\n' +
+    'BwNCAATfCH3q528xCDpTCHAd1bgjh5wytgU0qWKG4XOihHTpXyFW9budmWwOFioR\n' +
+    'OIbSx1mN6En8E560QjlZzRknIzOzo4IBXTCCAVkwHQYDVR0OBBYEFIdPsQ39CfxO\n' +
+    'JY1T2qlddg7Gwv6nMB8GA1UdIwQYMBaAFOcHyl2VXPnIoP7O42RFHoCzLDLBMGEG\n' +
+    'CCsGAQUFBwEBBFUwUzBRBggrBgEFBQcwAoZFaHR0cDovL2V1LmNlcnQuZXpjYS5p\n' +
+    'by9jZXJ0cy9kYWExYjRiNC04NWZkLTRiYTQtYjk2Yi0zMzJhZGQ4OTljZTkuY2Vy\n' +
+    'MB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATAiBgNVHREEGzAZghdmdW5r\n' +
+    'ZS5kZW1vLnNwaGVyZW9uLmNvbTAOBgNVHQ8BAf8EBAMCBaAwYQYDVR0fBFowWDBW\n' +
+    'oFSgUoZQaHR0cDovL2V1LmNybC5lemNhLmlvL2NybC8yY2RmN2M1ZS1iOWNkLTQz\n' +
+    'MTctYmI1Ni0zODZkMjQ0MzgwZTIvY2FzcGhlcmVvbmNvbS5jcmwwCgYIKoZIzj0E\n' +
+    'AwIDSAAwRQIhALz0V+89FVAIEamNEnXy/TP2bBJR5yE8i/1l4fhSeGdUAiAk8/1f\n' +
+    'vlqgdD+DS48bBXK0s0ZfALgdAGO/jOttA+tLYg==\n' +
+    '-----END CERTIFICATE-----'
 
 const walletPEM =
   '-----BEGIN CERTIFICATE-----\n' +
@@ -96,15 +98,14 @@ const funkeTestIssuer =
 const animoFunkeDER =
   'MIH6MIGhoAMCAQICEDlbxpcN1V1PRbmc2TtPjNQwCgYIKoZIzj0EAwIwADAeFw03MDAxMDEwMDAwMDBaFw0yNTExMjIwODIyMTJaMAAwOTATBgcqhkjOPQIBBggqhkjOPQMBBwMiAALcD1XzKepFxWMAOqV+ln1fybBt7DRO5CV0f9A6mRp2xaMdMBswGQYDVR0RBBIwEIIOZnVua2UuYW5pbW8uaWQwCgYIKoZIzj0EAwIDSAAwRQIhAIFd2jlrZAzLTLsXdUE7O+CRuxuzk04lGo1eVYIbgT8iAiAQhR/FonhoLLTFjU/3tn5rPyB2DaOl3W18W5ugLWHjhQ=='
 
-describe.skip('functions: validateX5cCertificateChain', () => { // FIXME SDK-46
+describe('functions: validateX5cCertificateChain', () => { // FIXME SDK-46
   const validChain = [walletPEM, sphereonCA]
 
   const invalidChain = [externalTestCert, walletPEM, sphereonCA]
 
-  // TODO: Disabled as cert expired
-  xit('should validate a valid certificate chain without providing a CA as trust anchor, but with trustRoot enabled', async () => {
+  it('should validate a valid certificate chain without providing a CA as trust anchor, but with trustRoot enabled', async () => {
     const result = await validateX509CertificateChain({
-      chain: [walletPEM, sphereonCA],
+      chain: [sphereonTest, sphereonCA ],
       opts: { trustRootWhenNoAnchors: true } /*, trustedCerts: [sphereonCA]*/,
     })
     expect(result).toMatchObject({
@@ -257,13 +258,13 @@ describe.skip('functions: validateX5cCertificateChain', () => { // FIXME SDK-46
 
   it('should validate with client id scheme x509_san_dns and san_uri', async () => {
     expect(() =>
-      assertCertificateMatchesClientIdScheme(pemOrDerToX509Certificate(sphereonTest), 'test123.test.sphereon.com', 'x509_san_dns')
+      assertCertificateMatchesClientIdScheme(pemOrDerToX509Certificate(sphereonTest), 'funke.demo.sphereon.com', 'x509_san_dns')
     ).not.toThrow()
     expect(() => assertCertificateMatchesClientIdScheme(pemOrDerToX509Certificate(sphereonTest), 'nope.test.sphereon.com', 'x509_san_dns')).toThrow()
 
     // The extension san_uri is not in the cert, so should throw error in case the above validating clientid for san_dns is used but now for san_uri
     expect(() =>
-      assertCertificateMatchesClientIdScheme(pemOrDerToX509Certificate(sphereonTest), 'test123.test.sphereon.com', 'x509_san_uri')
+      assertCertificateMatchesClientIdScheme(pemOrDerToX509Certificate(sphereonTest), 'funke.demo.sphereon.com', 'x509_san_uri')
     ).toThrow()
   })
 })