When you write a prompt, you author an idea. Until now, there was no way to prove it. PromptLedger changes that, silently and instantly, at the moment of creation.
Hash, timestamp, and anchor every prompt to the blockchain at the moment of creation. Instant. Silent. Permanent.
Semantic search across your prompt history to surface similar prior work, inside your team or across your organisation.
Demonstrate you hold the original prompt to any third party, without revealing its content. Privacy-preserving ownership.
Every AI platform (ChatGPT, Claude, Midjourney, Gemini) processes your prompt and discards it. The response is kept, trained on, and displayed. The prompt, the original human thought that produced it, leaves no traceable record.
As courts and regulators increasingly locate creative ownership in the prompt rather than the AI output, the absence of a timestamped record is becoming a material legal and commercial risk. If two people arrive at the same idea (the same prompt, the same project, the same concept) the dispute becomes impossible to settle. There is no mechanism to establish who got there first.
Existing tools (content watermarking, blockchain NFTs, file notarisation) all protect the output. None of them protect the prompt. That gap is what PromptLedger was built to close.
"The output is the rendering.
The prompt is the idea.
We built the infrastructure to prove it."
PromptLedger · 2026
PromptLedger works silently in the background — as a browser extension, a desktop application, or an enterprise network layer. The moment you submit a prompt, it takes a unique fingerprint of your exact words, attaches a certified timestamp from an independent authority, and locks both to a public blockchain. The whole process takes milliseconds. Your workflow does not change.
What you get is a certificate of authorship. It proves, to any court or counterparty, that you wrote that specific prompt at that specific moment. The prompt itself is never stored or shared unless you choose to share it — ownership is established without exposure.
For teams and organisations, PromptLedger also scans your prompt history for similar prior work, surfacing potential overlaps before they become disputes. And if you ever need to demonstrate ownership to a third party without revealing the prompt itself, you can do exactly that: prove you hold the original without disclosing a single word.
01 · Stamp
Every prompt is fingerprinted, timestamped, and anchored to the blockchain the moment you submit it. Instant. Silent. Permanent.
02 · Search
Automatically scans your prompt history for similar prior work — inside your team or across your organisation — before conflicts arise.
03 · Prove
Demonstrate to any third party that you hold the original prompt, without ever revealing its contents. Ownership without exposure.
In 2026, US federal courts affirmed that AI systems cannot hold copyright or inventor status. Creative and commercial ownership in AI-assisted work resides in the human author of the originating prompt. The prompt is now the legally decisive object, and it is still almost universally unprotected.
The EU AI Act Article 50 enforcement begins August 2026, requiring provenance metadata on AI-generated content at scale. Organisations that cannot trace the human origin of their AI work will face regulatory exposure. The creators and companies building that infrastructure now will have a structural advantage that is very hard to close later.
We are early. That is the point.
PromptLedger is in early development. If the problem resonates, or if you are simply curious about where this is going, we would be glad to hear from you.
First to know. First in.