Overview
NuAuth is a content authenticity and licensing tool that lets creators stamp their work on-chain at the moment it's made. Now in beta on the Cardano test network, the protocol is built so publishers, media companies, and individual creators can later verify who created a piece of content and when. The protocol also lets them charge for use through automatic licensing, with the rules enforced by code rather than paperwork1.
NuAuth is built on Cardano, with privacy features layered on through Cardano's sister chain Midnight (a zero-knowledge network designed for sensitive data). It is one of eight product lines from Nucast Labs, whose team also won first prize at the Midnight Hackathon at Rare Evo for an early version of this protocol2.
Key Features
- On-chain content stamping. When a creator registers a piece of work, NuAuth makes a unique cryptographic fingerprint of it and saves that fingerprint on the Cardano blockchain. The original file stays private; the blockchain only holds the fingerprint, signature, and ownership record, which is enough to later prove the work is authentic3.
- Automated licensing and royalties. Creators set conditions for how their work can be reused, and smart contracts (small programs that run on-chain) collect payment when those conditions are met. There's no manual chasing of usage fees, and every license shows up as an on-chain transaction3.
- Three product lines for different content needs. NuArchive registers existing back-catalogs of media. NuSource provides verified, copyright-cleared datasets for AI training. NuAuth Marketplace is a software kit that publishers can drop into their own apps to stamp new content as it's created1.
- Privacy through zero-knowledge proofs. Sensitive datasets can be verified as authentic without revealing what's inside them. NuAuth uses Midnight's zero-knowledge layer so AI companies and licensees can confirm a dataset is genuine and licensed, without seeing the underlying content until they pay for access2.
- Decentralized IP Explorer. A public website at explorer.nuauth.nucast.io shows registered content, transaction counts, and a chat agent that answers questions about how a piece of content was stamped. It's a free view of what's been recorded on-chain, with no account required1.
What to Expect
The main NuAuth site is a single-page overview built for publishers and AI companies looking to talk to the team. The clearest call to action is "Book a call," so onboarding runs through direct contact with Nucast Labs rather than self-service signup. Technical detail lives in the Catalyst proposals and an introductory Medium post, with milestone progress tracked on the Fund 14 page23.
Visitors who want to see the protocol working can open the IP Explorer subdomain. It runs on Cardano and shows an asset feed, transaction counter, and a chat agent. The on-chain counters are publicly visible on the explorer, which keeps activity transparent while the protocol is in beta1.
Behind the product, Nucast Labs is an active studio with the parent organization on GitHub shipping work across several connected projects, including a separate MidnightZK data marketplace repository under continued development4. Updates come through the parent Nucast accounts on X and Medium rather than a dedicated NuAuth channel.
