WTX-1: Cross-Domain Context Preservation Protocol

This document defines the WTX-1 (WaiTag Transfer Protocol, version 1) for preserving pseudonymous user context across unrelated web domains without third-party cookies, browser fingerprinting, login requirements, or personal data collection. The protocol uses cryptographically generated pseudonymous identifiers (WaiTags), URL hash fragment transport, server-side verification, and DNS-based domain authorization to enable privacy-respecting cross-domain analytics.