Electromagnetic Radiation Redshifts with Propagation Distance in the Presence of Obstacles (Edward Conway, 2015).
Abstract (Full text redshift.pdf)
This paper applies Landauer's principle to show that in the presence of obstacles, destructively observed electromagnetic radiation must redshift with propagation distance in order to obey energy conservation.

BibTeX Citation

@misc{Redshift,
   author = "Conway, E.",
   title = "Electromagnetic Radiation Redshifts with Propagation Distance in the Presence of Obstacles",
   year = "2015",
   url = "http://redshift.edwardconway.net"
 }

Trusted Timestamp
The following pseudocode results in the bitcoin address 1PCAYhzYjLgX7zfMNm2DjVDMNRQw82bqxE which was first funded at 2015-03-01 14:54:38 UTC:

hash = CONCAT(0x00, RIPEMD160(SHA256(redshift.pdf)))
1PCAYhzYjLgX7zfMNm2DjVDMNRQw82bqxE = BASE58(CONCAT(hash, SHA256(SHA256(hash))[0..3]))