1. Git. https://git-scm.com/ [Online accessed: 13-March-2019].
2. Tierion's Hash API. https://tierion.com/ [Online accessed: 13-March-2019].
3. M. Asghar, M. Ion, G. Russello, and B. Crispo. Securing Data Provenance in the Cloud. Open Problems in Network Security, pages 145--160, 2012.
4. J. Benet. IPFS-Content Addressed, Versioned, P2P File System. arXiv preprint arXiv:1407.3561, 2014.
5. V. Buterin et al. A Next-Generation Smart Contract and Decentralized Application Platform. white paper, 2014.