The Bitcoin "timechain" is just another name for the Bitcoin blockchain. Each block in the chain includes a timestamp, showing when it was mined.

Now, these timestamps are pretty important - they help keep everything in order and prevent double-spending. You can think of them like digital breadcrumbs, helping to trace the history of every bitcoin.

But remember: while they're called "timestamps", they don't need to be super precise. As long as blocks are being added roughly every 10 minutes, the system works just fine!