diff --git a/src/ddo/DDO.ts b/src/ddo/DDO.ts
index 04dfc516b..cdace66f7 100644
--- a/src/ddo/DDO.ts
+++ b/src/ddo/DDO.ts
@@ -117,35 +117,10 @@ export class DDO {
   }
 
   /**
-   * Generates proof using personal sing.
+   * Generates and adds a simple hash proof on publicKey
    * @param  {Ocean}          ocean     Ocean instance.
    * @param  {string}         publicKey Public key to be used on personal sign.
-   * @param  {string}         password  Password if it's required.
-   * @return {Promise<Proof>}           Proof object.
-   */
-  public async generateProof(
-    ocean: Ocean,
-    publicKey: string,
-    password?: string
-  ): Promise<Proof> {
-    const checksum = this.getChecksum()
-
-    const signature = await ocean.utils.signature.signText(checksum, publicKey, password)
-
-    return {
-      created: new Date().toISOString().replace(/\.[0-9]{3}/, ''),
-      creator: publicKey,
-      type: 'DDOIntegritySignature',
-      signatureValue: signature
-    }
-  }
-
-  /**
-   * Generates and adds a proof using personal sing on the DDO.
-   * @param  {Ocean}          ocean     Ocean instance.
-   * @param  {string}         publicKey Public key to be used on personal sign.
-   * @param  {string}         password  Password if it's required.
-   * @return {Promise<Proof>}           Proof object.
+   * @return {Promise<void>}
    */
   public async addProof(
     ocean: Ocean,
@@ -155,6 +130,14 @@ export class DDO {
     if (this.proof) {
       throw new Error('Proof already exists')
     }
-    this.proof = await this.generateProof(ocean, publicKey, password)
+    this.proof = {
+      created: new Date().toISOString().replace(/\.[0-9]{3}/, ''),
+      creator: publicKey,
+      type: 'AddressHash',
+      signatureValue: Web3Provider.getWeb3()
+        .utils.sha3(publicKey)
+        // TODO: security/detect-unsafe-regex
+        .replace(/^0x([a-f0-9]{64})(:!.+)?$/i, '0x$1')
+    }
   }
 }
diff --git a/src/ocean/Assets.ts b/src/ocean/Assets.ts
index f0f41e5e9..85536e770 100644
--- a/src/ocean/Assets.ts
+++ b/src/ocean/Assets.ts
@@ -18,8 +18,6 @@ export enum CreateProgressStep {
   DataTokenCreated,
   EncryptingFiles,
   FilesEncrypted,
-  GeneratingProof,
-  ProofGenerated,
   StoringDdo,
   DdoStored
 }
@@ -188,11 +186,7 @@ export class Assets extends Instantiable {
             index: indexCount++
           })) as Service[]
       })
-      this.logger.log('Generating proof')
-      observer.next(CreateProgressStep.GeneratingProof)
-      await ddo.addProof(this.ocean, publisher.getId(), publisher.getPassword())
-      this.logger.log('Proof generated')
-      observer.next(CreateProgressStep.ProofGenerated)
+      await ddo.addProof(this.ocean, publisher.getId())
       this.logger.log('Storing DDO')
       observer.next(CreateProgressStep.StoringDdo)
       // const storedDdo = await this.ocean.metadatacache.storeDDO(ddo)