Sayig: Document Signing and Verification

Sayig proposes a focused digital document signing and verification system for Bhutanese use cases. The project uses Bhutan NDI-backed identity and blockchain records to help users prove that a document was signed by the expected party and has not been changed after signing. The prototype centers on the core workflow of uploading or preparing a document, associating it with a verified identity, creating a signature record, and enabling later verification. Ethereum is used as a tamper-evident layer for signature-related records, while Bhutan NDI provides the identity foundation needed to connect a signature to a trusted person or organization. The public-service need is straightforward: many government, education, and business processes depend on documents whose authenticity must be checked. Manual verification can be slow, inconsistent, or dependent on institutional backchannels. Sayig aims to provide a simpler and more transparent verification path for signed digital records. This proposal is especially relevant for administrative workflows where the most important goal is not a complex platform, but a reliable way to connect documents, identities, and verification evidence. Project links: - Submission: https://speedrunethereum.com/builds/e279e115-9b01-4277-946b-ee71a4e9f111 - Code: https://github.com/tenze21/sayig.git Contributors: Tenzin Choda; Garab Phuntsho Wangyel; Karma Tenzin; Yoenrab Phuntsho