[denisnazarov]

The short answer is reputation. Consumers of the data should be able to filter by cryptographic signature to prioritize users that have more reputation over ones that don't. A timestamp is just one piece of metadata.

For example, on a platform like Soundcloud there are many Rhiannas but it is obvious which account the "real" Rihanna is because she has the most followers, likes, etc. Popularity can be another data point.

Projects like Blockstack already offer solutions that take a similar approach, allowing you to link your social media accounts so your identity is more trustable.

We also envision developers and trusted organizations like Creative Commons or DPLA creating indexes on top of Mediachain to help users filter the data.

[dublinben]

Reputation is not as easy to measure as simple popularity. There are very many "content creators" like LadBible who are orders of magnitude more popular than the actual content creators they steal from.

[Avshalom]

That's not much of a "how".

Okay dispute happens Alice has Reputation X and Bob has Reputation Y. So first who or what does Alice dispute to and second so what: if X > Y, Alice becomes the owner?