diff --git a/integration/ocean/AssetOwners.test.ts b/integration/ocean/AssetOwners.test.ts
index a32a904..e188ffc 100644
--- a/integration/ocean/AssetOwners.test.ts
+++ b/integration/ocean/AssetOwners.test.ts
@@ -25,7 +25,7 @@ describe('Asset Owners', () => {
         }
     })
 
-    it('should be set correctly the owner of a asset', async () => {
+    it('should be set correctly the owner of an asset', async () => {
         const ddo = await ocean.assets.create(metadata as any, account1)
 
         const owner = await ocean.assets.owner(ddo.id)
@@ -33,6 +33,17 @@ describe('Asset Owners', () => {
         assert.equal(owner, account1.getId())
     })
 
+    it('should be set correctly the provider of an asset', async () => {
+        const ddo = await ocean.assets.create(metadata as any, account1)
+
+        const isProvider = await ocean.keeper.didRegistry.isDIDProvider(
+            ddo.id,
+            config.brizoAddress
+        )
+
+        assert.isTrue(isProvider)
+    })
+
     it('should get the assets owned by a user', async () => {
         const { length: initialLength } = await ocean.assets.ownerAssets(
             account2.getId()
diff --git a/src/keeper/contracts/DIDRegistry.ts b/src/keeper/contracts/DIDRegistry.ts
index abf441b..eca2cb4 100644
--- a/src/keeper/contracts/DIDRegistry.ts
+++ b/src/keeper/contracts/DIDRegistry.ts
@@ -1,4 +1,3 @@
-import Web3Provider from '../Web3Provider'
 import ContractBase from './ContractBase'
 import { zeroX, didPrefixed, didZeroX } from '../../utils'
 import { InstantiableConfig } from '../../Instantiable.abstract'
@@ -28,13 +27,17 @@ export default class DIDRegistry extends ContractBase {
     }
 
     public async getDIDOwner(did: string): Promise<string> {
-        return this.call('getDIDOwner', [zeroX(did)])
+        return this.call('getDIDOwner', [didZeroX(did)])
     }
 
     public async getBlockNumberUpdated(did: string): Promise<number> {
         return +(await this.call('getBlockNumberUpdated', [zeroX(did)]))
     }
 
+    public async isDIDProvider(did: string, provider: string): Promise<string> {
+        return this.call('isDIDProvider', [didZeroX(did), zeroX(provider)])
+    }
+
     public async getAttributesByOwner(owner: string): Promise<string[]> {
         return (await this.getPastEvents('DIDAttributeRegistered', {
             _owner: zeroX(owner)