The chain is untouched, only the writing has been scraped away. A place a human hand has touched always shows.

• KohakuYou really shouldn't go in there without permission. Really, truly shouldn't.
  Shiranui AzusaYour master already walked out of there. Nothing is off-limits anymore.
• HisuiIf you want to know how heavy that chain is, hold out your wrist and find out.
  Shiranui AzusaI already know. My house was the one that held it, a thousand years ago.