How Can AI-Generated Images Receive Proof of Existence?

How Can AI-Generated Images Receive Proof of Existence?

An AI-generated image can receive proof of existence the same way any digital file does: by running it through a cryptographic hash function like SHA-256 to generate a unique fingerprint, then anchoring that fingerprint to a public blockchain with a timestamp. The image itself never has to leave the creator's device. What gets recorded on-chain is the hash, not the picture, which means the process works whether the image came from Midjourney, DALL-E, Stable Diffusion, or a custom fine-tuned model. The resulting record proves a specific file existed, unaltered, at a specific point in time which is a different and often more useful claim than trying to prove who "authored" it.

For an AI-generated image, evidence of prior existence and questions about authorship or rights are separate matters.

Proof of Existence Does Not Determine Copyright

A timestamp does not establish whether an AI-generated image qualifies for copyright protection. That question depends on the applicable law and the facts of its creation. Certelo records a fingerprint and timestamp; it does not assess human creative input, assign rights or register copyright.

For a creator or business, a timestamp provides a reference for a particular saved image. Keep prompts, generation settings, edit history and licences separately to explain the process. A file hash does not identify which model or prompt generated the image, and it does not establish ownership or disclosure compliance.

What Hashing Actually Captures

A SHA-256 hash is a one-way mathematical function that converts a file into a fixed-length string of characters. Change a single pixel in the image even one invisible to the human eye and the resulting hash changes completely. This is what makes the hash useful as a fingerprint: it's unique to that exact file, it can be regenerated by anyone with the same file to confirm a match, and it reveals nothing about the image's contents to anyone who only sees the hash.

When that hash gets submitted to a blockchain, the transaction itself becomes the timestamp. Blockchains operate on a public, distributed ledger that no single party controls, so the recorded time isn't something a company can quietly edit later. Anyone a court, an insurer, a licensing partner, a competitor's attorney can independently take the same image file, generate its hash, and compare it against the blockchain record without needing to trust the platform that created the original timestamp. That independent verifiability is the entire point. A PDF with a printed date or a file's metadata "created" field can both be edited after the fact with basic software. A blockchain entry can't.

How This Compares to the Methods People Already Use

Most creators working with AI-generated images currently rely on one of a few informal methods, and each has a specific weakness:

• Cloud storage timestamps (Google Drive, Dropbox, iCloud) show an upload or modification date, but that date is set by the storage provider and can be altered by re-uploading, syncing across devices, or in some cases by direct manipulation of account settings.

• Email correspondence may help explain when a file was shared. Preserve the messages and attachments; Certelo does not determine their legal weight.

• File metadata (EXIF/XMP) embedded by generation tools can note a creation date, but metadata is stripped or rewritten constantly by social platforms, by editing software, by simple file conversion so it's unreliable as standalone evidence.

• Screenshots of generation history inside a tool like Midjourney's Discord server or a web dashboard depend on that platform staying online and that history remaining unedited, which is outside the creator's control.

Blockchain timestamping avoids all four problems at once. The hash is generated locally, the blockchain record is immutable once confirmed, and verification doesn't depend on any single company staying in business or keeping its records intact.

Getting a Timestamp on an AI-Generated Image, Step by Step

The process is short enough to run on every meaningful version of an image, not just the final export:

1. Generate the image and save the final file locally, in whatever format the tool outputs (PNG, JPEG, WebP).

2. Run the file through Certelo's client-side hashing process directly in the browser. The file is hashed on the device it is never uploaded to a server.

3. Submit the resulting hash for blockchain anchoring. This creates a permanent, timestamped record tied to that exact file.

4. Save the confirmation record, which includes the hash, the transaction reference, and the timestamp.

5. Repeat for significant iterations a first draft, a client-approved version, a final delivered file since each distinct version produces its own unique hash and needs its own timestamp.

Because the hashing happens locally, this works even for images under NDA, unreleased product renders, or concept art that hasn't been shown to anyone yet. Nothing about the image content is exposed in the process.

Where This Intersects With C2PA and AI Disclosure Rules

Treat file verification, provenance information and disclosure obligations as separate parts of the record.

Provenance metadata, including C2PA content credentials where available, may contain statements about an image’s origin and edits. Preserve the original file with that metadata. A timestamped hash can check whether an exact file matches; it cannot recover stripped metadata or authenticate the statements inside it. Removing metadata generally creates a different file and hash.

Keep records of generation and editing and follow the disclosure rules that apply to the use of the image. A timestamp can support the existence of a saved version by the recorded time. It does not establish AI origin, compliance with the EU AI Act or the accuracy of a disclosure.

Legal acceptance and evidentiary weight depend on the jurisdiction and the complete facts. Certelo makes no guarantee of admissibility, copyright protection or a successful dispute outcome. Preserve the original file and supporting records.

To create proof with Certelo, select the image in the browser, follow the certification flow and retain the resulting proof references. The image is hashed locally without upload. Check the confirmation status rather than assuming a fixed completion time.

Certelo — fast, affordable proof of existence for the files that matter.