The photos of each watch are stored on-chain by emitting events into the block headers. This ensures the integrity of the physical watches and their association with the token.

To retrieve the photos, users can query the smart contract directly. This ensures that the visuals are accessible to all users and not stored on a centralized server. A quick tutorial is provided here.

The main informations for each watch are stored on-chain. This includes the brand, model, reference and year. Ensuring that these information are immutable and transparent.

All sensitive data has been hashed to not expose any personal information. This includes owner name, e-mail, serial number. The hash is stored on-chain to ensure the integrity of the data. Then any owner can prove the provenance of the watch by providing the original data.

The smart contract is immutable, meaning that the data stored on-chain cannot be altered or deleted by anyone. This ensures the integrity of the data and the provenance of the watches.

For each update during the watch lifecycle, only Watch Certificate can emit an update on the smart-contract. This process doesn't erase past data. This ensures the traceability of the data and the provenance of the watches.

We applaud the initiative of Watch Certificate to provide a tool to verify the authenticity of a watch. This is a great step towards the transparency and trust in the watch industry.

We note the clear and concise documentation provided by the Watch Certificate team, which has been instrumental in understanding the image proof verification : here.