This is a proof of concept.
This PDF has been frozen, hashed with SHA-256, and the hash inscribed on Bitcoin. The hash, transaction id, block height, and verification instructions are published as a separate certificate at:
book.satsrail.com
The architecture the book describes is not built. This is one anchor on the substrate, under one key, against one PDF. No Tree, no protocol, no infrastructure, just the smallest possible version of the gesture the book argues for, performed on the book itself so the gesture is demonstrated at least once before the architecture exists.
The PDF includes its warts. Sentences that could have been clearer. An analogy that strains. A paragraph the author would write differently a year from now. None of those were edited out before the freeze. A book that is committed cannot be silently revised; that is the entire point. A polished version, committed later, is a different leaf.
To verify: retrieve the PDF from the addresses on the certificate, compute its SHA-256, compare. The chain is the authority. If the digests do not match, the file has been altered.
This is anchor one. The rest is time.
The Keymaker