Your own Personal Blockchain.

Your Data.

Controlled by You.



Upload any legal document image and record its existence on a tamperproof hashed blockchain. Retain the private key or email to trusted custodians e.g lawyers or accountants. We are working on an app only fully open source version for 2019 so watch this space.


ChainKey allows you to record important information onto a blockchain to create a permanent and tamper proof record.

Use cases include storage of wills, legal contracts and patentable ideas. Simply take a photograph and click a button. Send the private key automatically as an email to your lawyer or other trusted party.

Store any document in a public or private datastore that is permanent, tamperproof and unhackable. The document is recorded on a blockchain and only you or a nominated trusted party has access and can prove ownership. ChainKey is used by commercial landlords, fashion students, art sellers and lawyers. The sky is the limit.

Store the record on Ethereum or your own private blockchain using Hyperledger / Cello. Use IBM or AWS or Grandeo cloud.

Use CKEY or GDO ERC20 tokens as credits.



  • Upload document
  • Create passcode
  • Nominate private key recipient
  • Process
  • Document recorded on blockchain.


ChainKey is GDPR and privacy friendly - it stores no personal information and only the user or nominated trusted third party has the private key to access it.

Wills, intellectual property, trade marks, proof of concepts, blueprints, vintage wines, horses, private legal documents

Avoid GDPR and keep control of your identity


Documents indexed on the grandeo blockchain


Anon users using ChainKey

Free to Use

Anon use free. For custodian cold storage contact us

Open Source

chainkeyio limited

Upload and
take control.

chainkeyio limited
1 fore street avenue london uk