How much does a digital timestamp / proof-of-existence certificate cost?

If you searched “timestamp certificate cost,” “proof of existence price,” or “how much to timestamp a file,” you are usually comparing a few dollars per file against government registration fees that can take weeks. IdeaProofNow sells a dated SHA-256 fingerprint of exact file bytes — a technical prior-existence record, not a copyright office filing.

Current IdeaProofNow prices

• Pay-per-file: $4.99 — buy one, get one (two stamps). Credits do not expire.
• Creator: $9 / month for 20 stamps; extra files $0.99 each.
• Studio: $39 / month for 100 stamps; extra files $0.49 each.
• Looking up an existing certificate on the verify page is free and needs no login.

What you are paying for

A paid stamp creates a new public certificate ID with UTC time, an operations-log trail, and optional OpenTimestamps / Bitcoin anchoring. Hashing typically runs in your browser so the original stays with you. Free SHA-256 calculators elsewhere only print a digest; they do not issue a dated, look-uppable certificate.

• You keep the source file on a standard stamp.
• Anyone can re-hash the same bytes later and match your certificate.
• This does not replace copyright registration where the law requires it.
• It does not by itself prove authorship or guarantee a lawsuit outcome.