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Getting Started with Coldlink

Coldlink is a new verification tool that lets you securely link blockchain addresses to other identifiers.
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Apr 2, 2025 • 2 min read

Coldlink lets you verify blockchain ownership securely, with no smart contract approvals or blind signing needed. Let's catch you up on its basics and how you can try it for yourself.

Launched by DFZ Labs, the creators of the Deadfellaz ecosystem, Coldlink is a new universal verification tool.

In other words, it allows you to link a blockchain address to any other identifier, like another wallet, a social media handle, an NFC chip, etc., and without putting your assets at risk.

Unlike Delegate, which is built on smart contracts, Coldlink works offchain through a simple transaction verification system. Instead of onchain programmability, Coldlink offers ease and versatility.

How it works

The mechanics of Coldlink are straightforward.

You link your wallet by sending a tiny confirmation transaction to the address provided by Coldlink. The platform then verifies the transaction and creates a connection in its offchain database.

At this point, developers and apps can check this database via API to confirm your ownership. Keep in mind, too, that connections expire automatically after the chosen duration, i.e. 1 day to 1 year.

Why does this sort of system matter?

Firstly, it offers fast and cheap delegation (e.g. connect a hot wallet to a cold wallet to claim an airdrop safely) or verification (e.g. this is my Instagram account). Connections cost ~$1 and take less than a minute to set up.

Secondly, it has no direct onchain attack vectors. You initiate your connection deposits from your wallet; Coldlink itself doesn't trigger transactions or ask you for any signatures.

Lastly, it can be a great bridge between the onchain world and web2 platforms. There are a lot of use cases possible around being able to link all your offchain accounts to your wallets of choice.

Right now, it's possible to use Coldlink to link Ethereum or Solana addresses with other Ethereum or Solana addresses, with more options coming soon. Here’s how you can dive in here:

  1. Visit coldlink.xyz — Then click the "Create a Coldlink" button
  2. Select your blockchain — Choose between Ethereum or Solana for now
  3. Enter your address — This is the address you want to protect
  4. Choose the link duration — 1 day, 1 week, 1 month, 1 year, etc.
  5. Pick a destination — Select the chain of the address you want to link to, input your desired connection address, then press "Submit"
  6. Confirm by sending a tiny ETH/SOL transaction — Pay the small deposit to the address provided by Coldlink, e.g. coldlinkxyz.eth, to complete the connection

After your deposit is confirmed, that's it! Your Coldlink is now live.

It's important to keep in mind that the platform just launched, so look for more apps to start supporting Coldlink and for the team to add support for more chains and connection types over time.

All that said, Coldlink can be a great complement to resources like Delegate in your personal crypto security stack, particularly with its upcoming support for connecting your offchain and onchain accounts. Giving it a try now will prepare you for all the possibilities to come here!

Not financial or tax advice. This newsletter is strictly educational and is not investment advice or a solicitation to buy or sell any assets or to make any financial decisions. This newsletter is not tax advice. Talk to your accountant. Do your own research.

Disclosure. From time-to-time I may add links in this newsletter to products I use. I may receive commission if you make a purchase through one of these links. Additionally, the Bankless writers hold crypto assets. See our investment disclosures here.

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