Abstract: Digital Witness is a solution based on advanced cryptographic techniques to ensure data integrity, authenticity, irrefutability and confidentiality at the point of data creation. The DigiWit process guarantee is based on using strong cryptographic techniques in conjunction with PKI and public/private block-chains. DigiWit process establishes a ‘root of trust’ for a digital artifact in conjunction with notarization provided by a trusted third-party. The result is a mathematical non-repudiable guarantee that the file under audit is exactly as recorded by the author. The authenticity of the author and the root of trust are provided by the notarizing trusted third-party. Integrity of the captured data is based on the time to insert its unique signature to the block-chain public ledger. This root of trust is intended to be permissible to prove authenticity of evidence in the legal arena (e.g., images of crime scenes, contracts, etc.) based on mathematical veracity.