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Signum Unlockable Content for NFTs

Unlockable content for NFTs with encrypted P2P messages makes Signum the first chain to add this feature securely and on chain.

unlockable content on Signum chain

What is an NFT?

NFTs are non-fungible tokens that exist on the blockchain, meaning they are not interchangeable with any other NFT. Each NFT is unique and exists via authentication keys linked to a smart contract; essentially working as proof of ownership. They typically come in the form of a digital item like an artwork, with unlockable content holding the key to adding value and extra creative dimensions to that artwork.

What is unlockable content?

You should think of unlockable content like bonus content. For example, when you buy a DVD as compared to when you stream it, you get bonus content like director’s commentary or bonus scenes, all in one neat package.

Unlockable content is available as an option on when you set up your NFT. It can be turned on after you have minted the NFT. Once you add unlockable content to your NFT, it will be linked to your NFT for collectors when they purchase or transfer your NFT. The content is changeable over time so you can also change or add content for your NFT collectors.

There are no limits to what your unlockable content can be, only limitation is a maximum 1,000 characters which can be text, links or anything else. Most commonly, creators attach high-res images or full-length videos as secret links, a physical copy or print of the artwork to be delivered, or an off-chain link to a google drive, dropbox, etc.

The ideas for unlockable content are endless, like maps to find other pieces of artwork, offers to tell the buyer a story, and a coupon to spend a day with the creator, or have a one-on-one class with the artist. It is all down to your creativity to harness the potential of a tool like unlockable content.

Key Points

  • The unlockable content feature allows creators to extend the value of their NFTs beyond a blockchain entry and its images.
  • Unlockable content is stored as encrypted message on Signum — on chain!
  • P2P encrypted messaging is used to share the content with the current owner of the NFT
  • It allows them to continuously reward token holders with exclusive content and access to restricted areas.
  • When you create an NFT on, you have the option of adding additional content that can only be revealed by the NFT owner.
  • This content is limited to plain text up to 1,000 characters, but can contain anything from URLs to discount codes.
NFT with unlockable content
Unlockable content included

Use Case

Imagine you’re an artist that specializes in animation/film and you’ve decided to launch your own NFT project.

Your objective is to create an entire universe around one of your characters, including a mini-series and maybe one day also a film as spin-off.

So the launch of your NFT collection essentially acts as a funding mechanism and while the individual NFTs may all have their own special artwork, the NFT themselves are not the core value proposition.

Instead, the NFTs are almost like owning a portion in the future success of the project.

But they also act as a secret key. The key that unlocks the additional unlockable content once you start releasing the first episodes of your mini-series. Only those who own one of your NFTs are supposed to be able to watch the episodes or see the director cut.

And this, in essence, is what the unlockable content feature is used for.

Here are some basic ideas for unlockable content:

  • Idea 1 — Offer buyers a free print of the art to be mailed.
  • Idea 2 — Share an inside story.
  • Idea 3 — Add links to other content like images, videos, music.
  • Idea 4 — Provide codes to redeem items at a discount.
  • Idea 5 — Access to a Discord server you manage for followers.
  • Idea 6 — Add codes for virtual items or tickets

How Does Unlockable Content Work?

Unlockable content can be added after creating an NFT on You are limited to plain-text content of maximum 1,000 characters, which means that any file will have to be hosted elsewhere. You can add links to those files in the unlockable content form on Please note that unlockable content is “on-chain” stored by encrypted messages within the Signum chain.


Unlockable content will be a core feature and a major enabler for many new forms of business models.

The unlockable content feature powered by Signum is the first of its kind storing this data as an encrypted message on-chain and is linked to the related NFT with the same security level and encryption standard used throughout the Signum blockchain.

A new and more secure approach in contrast to other portals like OpenSea or Rarible which store such data off-chain and in centralized company owned database(s).

Discover Signum

Signum is the world’s first truly sustainable blockchain, featuring world-class applications on a sustainable leading-edge blockchain architecture. Compared to other cryptocurrencies, Signum powers its native cryptocurrency Signa (SIGNA) with a minor fraction of energy use and e-waste. Signum empowers users and developers around the world with innovative blockchain solutions for everyday life.

SNA is a Swiss Not-for-Profit Organization founded in 2021 to provide a solid foundation for Signum to grow and fulfill its vision of sustainability and innovation in blockchain technology.

Find out more at or join a Signum channel below.
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