StampR issues an attestation certificate with evidentiary function that contains: author identification, declaration of authorship, work description, a unique digital fingerprint (cryptographic hash), and trusted time. The certificate provides a verification mechanism in the StampR registry, as well as through an independent third party - a trust service provider. The certificate has evidentiary value in the EU under eIDAS: it uses a qualified electronic timestamp that binds the copyrighted work to a specific date and time.
Upload the digital original of the work. Enter the work details and choose certificate settings related to file storage and the public visibility of the certificate and the original. To issue a certificate, you must declare authorship and pay the applicable fee. The system creates a unique digital fingerprint (cryptographic hash) that describes the content without revealing it. This fingerprint is linked to a qualified electronic timestamp.
StampR issues a certificate that contains the digital fingerprint, the attested data, and the time of attestation. The original itself is not included—the certificate preserves the verifiable link between the digital fingerprint and the timestamp.
You can compare the original’s fingerprint with the fingerprint in the certificate to determine whether the certificate refers to it and when it was issued. Verification can be done via the StampR register and/or through the qualified timestamp provider by validating the timestamp.
Choose your object — document, image, code, etc.
Set name, description and visibility
Declare authorship and get a certificate
The certificate serves as evidence of authorship with a qualified timestamp and can be used before any court or administrative authority in Bulgaria and throughout the EU. It is issued in line with Regulation (EU) No 910/2014 (eIDAS) and the Bulgarian Electronic Document and Electronic Certification Services Act.
Timestamping attaches a qualified electronic time stamp (QeTS) to the “digital fingerprint” (SHA-256 hash) of your file. This locks in the exact date and time when the content existed and guarantees it has not been altered afterwards. In StampR the process is automatic: the system calculates the hash server-side, sends a request to a trusted eIDAS-qualified provider (BORICA B-Trust), receives a Time-Stamp Token (TST), and issues a certificate with a unique serial number plus public verification instructions (QR/URL).
When a dispute arises (copying, theft, conflict over who was first), simply keeping the work to yourself is not enough. You need to be able to show that it existed on a specific date and that you declared authorship for it. Disclosure in StampR is exactly that: you make a declaration of authorship, it is fixed in time, and it is certified so it can later be easily verified that your claim was made at a specific moment. You can choose between public and confidential disclosure. With public disclosure, third parties can verify the certificate and see that valid certification exists and when it was made, which has a preventive effect and is convenient when presenting to partners, clients, or an audience. With confidential disclosure, you keep the same evidence and verification capability, but without making information publicly available beyond your selected settings, and the work content does not become visible. It is important to know that copyright arises automatically upon creation of the work. The certificate does not create rights; it supports proving authorship and the moment of declaration when that matters.
Almost any digital file: text documents (DOCX, PDF), images (PNG, JPG), audio/video (WAV, MP3, MP4), software code and archives (ZIP, TAR.GZ), designs, drawings, research data, and more. Even physical materials can be digitised (scan/photo) and then certified. StampR users cover a wide range: literary, musical, scientific and IT works, graphic and industrial design, photography, technical drawings. Note: The service does not replace patent or trademark registration. The certificate acts as supporting evidence (time + immutability) and is typically combined with other facts, documents, or testimonies in a dispute.
SHA-256 is a cryptographic algorithm that produces a unique “fingerprint” of a file. Even the smallest change to the original yields a completely different hash. This lets you prove that the certified content matches the original without sharing the file itself. StampR follows a privacy-by-design approach: only the hash and declaration metadata are stored, never the content.
Yes. A qualified electronic time stamp (QeTS) is defined by Regulation (EU) No 910/2014 (eIDAS) and recognised across all member states. It carries a presumption of accuracy for the recorded date/time and for the integrity of the linked data. In practice you can present the certificate as evidence before courts, institutions, or third parties in the EU. Remember that the certificate proves the declaration and immutability; it is usually combined with other evidence (contracts, correspondence, repositories) for full protection.
Visit the “Verify an object” section to:
You will receive confirmation of the stamp’s validity (time/provider), the hash match, and the visible certificate elements. If needed, you can also validate the Time-Stamp Token (TST) independently with external tools because it follows the RFC 3161 / ETSI EN 319 421/422 standards.