NextCert

NextCert is a digital certificate issuance platform launched in 2019 that implements the W3C Verifiable Credentials Data Model and builds upon GovTech Singapore's OpenAttestation framework. The platform supports issuing verifiable credentials across multiple blockchain networks including Ethereum, Tezos, and Zilliqa, using Merkle trees to store certificate hashes in smart contracts while keeping personal data off-chain.

The system's technical architecture consists of three core modules:

• NextCert Issuer - Web-based certificate creation and management
• NextCert Viewer - Certificate display and rendering
• NextCert Verifier - Verification of certificate authenticity

Notable implementations include HealthCerts for COVID-19 health status verification through Singapore's Safe Travel initiative, making NextCert compatible with international health passport solutions like CommonPass and IATA Travel Pass. The platform supports multiple credential schemas through a layered architecture that separates the JSON-LD data structure, visual HTML/CSS presentation, and certificate instance data.

The platform emphasizes enterprise features like multi-tenancy support and integration capabilities through APIs. While originally focused on academic credentials, NextCert has expanded to support various verification use cases including:

• Health status documentation
• Professional certifications
• Document authenticity
• Asset ownership
• Corporate training records

Key technical standards implemented include:

• W3C Verifiable Credentials
• W3C Decentralized Identifiers (DIDs)
• OpenAttestation Framework
• FHIR for healthcare interoperability