Timechain is a series of three works created from numerous repurposed fiat currencies.  While Timechain 1 & 2 sit atop wood panels, #3 is unique.  

Beneath the artwork a series of indentations corresponding with a 24 word seed phrase have been etched into a stainless steel plate.  The phrase accesses 1 BTC, yet is buried under primer, paint, the fiat currency and lastly, a coat of resin.  Should the owner lose faith in Bitcoin, my career or have some other rationale for needing access to the funds, they may do so by destroying the artwork.

However if they remain patient, the owner can preserve both the artwork and the bitcoin as every year on Oct. 30th, I will reveal one word from the seed phrase to them. The first word "model" has been revealed publicly.