DocAnchor Tamper-evident document time stamps
Prove when a document existed and that it has not changed, without sharing the document.
Included in: Included from Solo once anchoring launches (coming soon): Solo 100 time stamps a month · Builder 1,000 · Pro 5,000 · Protocol 25,000 · Custom by quote
DocAnchor at a glance
- Who it is for
- Businesses and private persons that issue or receive invoices, contracts, reports and other documents that may be disputed later.
- The problem it solves
- Proving that a file existed unchanged at a given date usually needs a third party, paperwork and cost.
What it does
- You send a fingerprint of the file. The document stays with you.
- Anchoring fingerprints on XDC is Coming soon.
- Anyone can check a receipt with the public verifier.
- No wallet is required to check a document.
- The file and personal data are not stored.
Two ways to record a document (Coming soon)
DocAnchor offers two kinds of record: a simple time stamp, and a record for transferable trade documents.
- Simple record: your browser computes the SHA-256 fingerprint of your file, and once anchoring launches (Coming soon) DocAnchor will record it on XDC Mainnet (chain ID 50) with an RFC 3161 time stamp and a Merkle inclusion proof. Your file is never uploaded and no personal data is stored. Simple time stamps are non-qualified electronic time stamps under eIDAS (Art. 41(1)).
- Transferable trade record (coming soon): a record for electronic trade documents such as electronic bills of lading, linked to your verified company identity (LEI, W3C DID or an EAS attestation). It is designed with UNCITRAL MLETR in mind. Whether it counts as an electronic transferable record depends on the law that applies.
- Checking a receipt is free and needs no account or wallet.
- If you send only the SHA-256 fingerprint, your document never leaves your systems.
- Anyone, including your auditor, can check a receipt independently with open-source tools.
Get access
Registering documents in FeedPlumb Workspace and anchoring from a wallet on the DeFi console are Coming soon. You can check a document for free today.
Check a document in this browser
The fingerprint is calculated here. The file does not leave this browser. Checking a receipt is free.
Standards DocAnchor uses
1. Time stamps: non-qualified electronic time stamps (eIDAS Art. 41(1)); token format IETF RFC 3161 / ETSI EN 319 422. 2. Transferable records (coming soon): designed with UNCITRAL MLETR (2017) and DCSA eBL 3.0 in mind; legal effect depends on the applicable law.
What a receipt shows, and what it does not
A simple-record receipt is evidence that a SHA-256 fingerprint existed no later than the XDC block time and RFC 3161 time stamp. A transferable-record receipt also records the issuer's verified identity and the record type (and, for a transferable record, who controls it). It supports evidence; it does not replace a notarial deed.
Legal status
DocAnchor is a non-qualified electronic time-stamp service under eIDAS (Reg. (EU) 910/2014 as amended by Reg. (EU) 2024/1183). Its time stamps do not carry the presumption of accuracy of a qualified time stamp (art. 41(2)), but they cannot be denied legal effect or admissibility as evidence solely because they are electronic or not qualified (art. 41(1)). DocAnchor is provided from the Netherlands. The Dutch supervisor for trust services is the RDI (Rijksinspectie Digitale Infrastructuur). As art. 19a requires, we report security breaches or disruptions with a significant impact to the RDI, and inform affected customers, without undue delay and in any case within 24 hours.
Security and incidents
A separate low-balance anchoring key, an owner key held offline (or a multisig), rate limits, no document storage and daily backups.