Sigillum is a proof and record-integrity platform operated by Hygenox Markets Limited. It helps organisations establish what a record was, when it was sealed, and who sealed it, creating a tamper-evident, append-only chain anchored to three independent public rails. Documents remain in the customer’s systems: Sigillum records a one-way fingerprint rather than the file itself, and users can verify proofs independently. Each seal includes the claimed event time and an independently verifiable recording time; optional eIDAS-qualified timestamps are available.

The platform serves legal, insurance, audit, energy, enterprise and financial-services, and AI-accountability use cases. Organisations can attest contracts, claims, audit evidence, sustainability records, decisions, model events, and regulatory submissions. Sigillum also provides tools to verify proofs, a browser-based file fingerprinting experience, an API for integrating event seals, and consultations and evidence walkthroughs. Its aim is to give parties a shared, verifiable record for disputes and regulatory scrutiny, while making clear that a seal proves a record’s integrity and timing—not the truth of its contents or any legal outcome.