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source-truth-timestamp

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How to Use the Source-of-Truth Timestamp

Prove you published something first. When AI scrapers copy your content within minutes of publication, this tool creates a browser-verified "First-Published Certificate" with a SHA-256 content hash and a timestamp synced to a public NTP server.

Step 1: Enter the title or headline of your content.

Step 2: Paste the first paragraph or key excerpt. The tool hashes this text to create a unique fingerprint.

Step 3: Enter your name or publication name.

Step 4: Click "Generate First-Published Certificate." The tool hashes your content with SHA-256, syncs the current time with worldtimeapi.org, and creates a JSON certificate that is stored in your browser's localStorage.

To verify later: re-hash your original content. If the SHA-256 hash matches the certificate, the content existed at the stated timestamp. This is the same cryptographic principle used in blockchain timestamps, but without the blockchain.

Proving You Were First: Content Attribution in the AI Scraping Era

Journalists, researchers, and content creators face a new problem in 2026. AI scrapers can ingest and republish your content within seconds of publication. By the time Google indexes both versions, the scraper may appear to have published first because it has a higher domain authority. Your original work becomes the "copy" in the eyes of search algorithms. The Source-of-Truth Timestamp gives you cryptographic proof that your content existed before the scraper published it.

How SHA-256 Content Hashing Works

SHA-256 is a cryptographic hash function that takes any input and produces a fixed-length 64-character string. The same input always produces the same hash, but even a single character change produces a completely different hash. When you paste your content into the tool, it computes the SHA-256 hash of your text. This hash is your content's fingerprint. If anyone claims your content is a copy, you can show that your certificate (with the matching hash) was generated before their publication date.

NTP Time Synchronization

A timestamp is only useful if it is trustworthy. Local computer clocks can be wrong, manipulated, or simply drift over time. The tool attempts to sync with worldtimeapi.org, a public NTP (Network Time Protocol) service, to get the current UTC time from an authoritative source. If the NTP sync succeeds, the certificate is marked as "NTP Verified." If the sync fails (because you are offline or the service is down), the certificate falls back to your local clock and notes this limitation.

localStorage Persistence

Certificates are stored in your browser's localStorage, which persists across sessions. This means you can return to the tool later and find all your previous certificates. For important content, copy the JSON certificate and store it in a more permanent location (cloud storage, a note-taking app, or even printed). localStorage is browser-specific and can be cleared, so it should not be your only copy.

Frequently Asked Questions

Is this as good as a blockchain timestamp?

It uses the same cryptographic principle (SHA-256 hashing) but without the decentralized verification of a blockchain. A blockchain timestamp is independently verifiable by anyone because the hash is recorded on a public ledger. This tool's certificate is stored locally and relies on the NTP timestamp for its time claim. For maximum credibility, you could take the generated hash and register it on a public blockchain (like Bitcoin's OP_RETURN or Ethereum) for independent verification.

What if someone modifies the content slightly?

Even a one-character change produces a completely different SHA-256 hash. This is by design. If someone copies your content and changes a single word, their hash will not match your certificate. This makes tampering immediately detectable.

Can I use this for legal disputes?

The certificate provides cryptographic evidence of content existence at a point in time, which may support a copyright or attribution claim. However, its legal weight depends on your jurisdiction and the specific circumstances. For high-stakes disputes, consider registering your content with a formal copyright office or using a blockchain-based timestamping service for stronger legal standing.