Is file hash / SHA-256 verification free?

Yes. On /verify anyone can upload a file or paste text at no cost, with no login. Your browser computes SHA-256 locally; we only look up whether that fingerprint already has an IdeaProofNow timestamp record. Creating a new stamp is separate and uses a paid credit. Per-file is buy one get one: $4.99 adds two stamps.

What can someone see with my certificate ID?

The verify page shows stamp time, title, and file fingerprint. If they upload the same file and the hash matches, the bytes were not altered. The record lives on the server, so another device can look it up. The fingerprint also enters the operations log and OpenTimestamps. An ID alone does not prove the person who sent it is the author.

Does IdeaProofNow file trademarks?

IdeaProofNow does not file trademarks. The product records a dated fingerprint of a creative file that others can look up. Official registration remains a separate process.

How do I prove the work in a dispute if you never store the original?

You keep the original. An examiner hashes that file with standard SHA-256, matches the certificate, and reads the recorded time. A hosted original would invite a claim that the operator changed the bytes.

Can you read my idea?

The browser computes the hash. Support staff see a manuscript only if you send it.

Can I cancel? How do refunds work?

Creator and Studio can be cancelled any time: sign in, open your vault from the header link, then tap Cancel subscription (at period end) under Subscription and billing. The next charge stops. Access in the current period lasts to period end. Completed stamps are not refunded. For a duplicate charge, or if credits never arrived, write to support@ideaproofnow.com with your email and receipt number. Full rules are in the Terms.

FREE · No login

Free: Verify any file

Upload a file to calculate SHA-256 in your browser, then check whether an IdeaProofNow timestamp record already exists. Free forever for verification. The source file is not uploaded for a standard check.

Also free: drop a proof-package JSON for Merkle checks, or run the offline CLI. Creating a new timestamp certificate is separate from this free verify tool.

Upload a file to verify (SHA-256)

Hashing runs locally. We only look up the digest against public certificates.

Or paste text to hash

Other free checks

Certificate ID or SHA-256

Proof package (JSON)

Use the JSON from “Download proof package”. Checks run in your browser; the original file is not uploaded.

Ready to timestamp

Hashing is free. A dated certificate is $4.99.

Buy one file, get two stamps. Credits do not expire. Verification stays free.

Timestamp a file See pricing

More than a typical SHA-256 calculator

Others give you a hash. We help you check for an independently verifiable prior-existence record.

Free SHA-256 verify plus timestamp / proof-of-existence lookup
Public operations log + Merkle — not only a local digest
Bitcoin / OpenTimestamps anchor — time is not only on our servers
Downloadable proof package you can verify offline

Stamp now · How it works · Guides · VERIFY.md