LPD (LaPrueba.Digital)

In a digital world where any document, photo, contract or creation can be altered without leaving a trace, LaPrueba.Digital lets you certify your files with timestamps on the Polygon blockchain and eIDAS qualification, obtaining a mathematically irrefutable proof of existence and integrity. What is it? It is a timestamping service that generates a verifiable digital evidence. It acts as a decentralised "digital notary": it proves that a file existed at an exact moment and that it has not been modified since. How does it work? Option A): Select your file: Any digital file (PDF, JPG, MP4, ZIP, source code, etc.). Limit of 85 MB per file. Option B): Capture a website and seal it as digital evidence along with its metadata and cryptographic hash. Option C): Take a photo from your mobile camera. Choose the storage mode: Public (accessible to everyone) or Private (access via a secure link that expires after 12 months, automatically renewable). We calculate its hash: We generate a unique digital fingerprint (keccak256) of your file. It is its "digital ID". Registration on IPFS: Your file is stored in a decentralised way, guaranteeing its availability for one year. Sealing on Blockchain: The digital fingerprint is immutably registered on the Polygon blockchain with an exact timestamp. What files can you seal? Any digital file: documents (PDF, Word, Excel), images (JPG, PNG), videos (MP4, AVI), audio (MP3, WAV), source code, emails, ZIP files, designs, sheet music, architectural plans, etc. What is it for? Intellectual and digital property: Prove authorship of works, creations and designs. Contracts and agreements: Give a certain date to legal documents. Legal evidence: Preserve screenshots, emails and messages. Academic certificates: Issue verifiable degrees and diplomas. Audits and finance: Seal reports, balance sheets and financial statements. Inventions and patents: Document the process of creating ideas. Photography and art: Register your visual works. Source code: Protect versions of your software. And basically any digital document. Legal validity The Polygon blockchain is recognised as a means of evidence in numerous countries. In Spain, Law 6/2020 and the European eIDAS Regulation (EU 910/2014) support digital evidence based on cryptography and blockchain. The blockchain seal ranks as the second most reliable digital proof, only behind qualified eIDAS services, and above expert reports, notarial acts or emails. If you need the maximum legal guarantee in the European Union, you can optionally add a qualified eIDAS timestamp, issued by an authorised provider, which reverses the burden of proof: it is the other party who must prove that the seal is not reliable. Security and transparency Your file is never published on the blockchain, only its digital fingerprint. Public and free verification on our platform: verifica.laprueba.digital. Downloadable PDF certificate with all the evidence. Decentralised IPFS storage for 1 year with automatic renewal. Flexible pricing 2 free credits when you sign up. 1 credit per public seal (€0.50). 2 credits per private seal (€1.00). Option to add a qualified eIDAS seal for 5 or 6 additional credits (€2.50 – €3.00). No mandatory subscription and no commitment.