Hash proof for any file — not only a certified PDF.
Prove bytes have not changed. Acrobat is still the PDF specialist.
The problem
Acrobat certifies and protects PDFs inside Adobe’s subscription. It is not a public verify link for an arbitrary zip or contract scan.
The docstoc way
SHA-256 certificate + shareable verify page. Not a replacement for Acrobat editing or qualified PDF signatures.
How docstoc compares
- Any file type
- Public verification URL
- Free to check
- Optional BTC timestamp
- Stay on Acrobat for PDF workflows