Understanding our past can determine our ability to understand the present. Many people associate cultural heritage with the ancient past and history; however, cultural heritage should be seen as a continuous tradition that lives through daily practices. In this paper, we present the details of our research dealing with one aspect of Balinese culture, the Balinese traditional communication system (kulkul), undertaken in the Indonesian island of Bali. The central aim of our project was to document, organize, and preserve the relevant kulkul knowledge for the benefit of the Balinese community, and the younger generations in particular by designing and developing a digital portal as a dynamic repository. A basic ontology of key kulkul-related concepts and terms and their interrelationships that as part of our digital portal was developed to support the semantic searching and browsing of the online portal and related resources. Much of the content for the digital portal was acquired through community-based crowdsourcing and the informants came from the different geographical areas in Bali. Members from the community were invited to contribute their knowledge to enable the online digital portal to evolve into a living repository of Balinese cultural knowledge. The significant number of digital cultural resources uploaded and the substantial growth of the kulkul ontology by the community are indicators of the success of this research project. The prototype digital portal is implemented on the cloud to facilitate elastic growth and easy user access to the resources both to read and to add content. Finally, the digital portal was made available online and extensive evaluation was carried out based on responses from selected users drawn from community by letting them use and experience the digital portal in order to evaluate the ease of use and usefulness. The evaluation results suggest that, for the most part, the users perceived the digital portal to be relatively useful and easy to use.