Study preregistration produces a single frozen, time-stamped, read-only snapshot document, not a continuously appended log

The Center for Open Science describes its own practice this way: "Preregistration is the practice of posting a time-stamped, read-only version of your study plan to a public repository before beginning data collection or analysis" (OSF Support, "Welcome to Registrations & Preregistrations!"). Once submitted, the document is frozen: "Once you submit a registration, you will not be able to edit or make changes to it or any associated files." A registration is defined as "a frozen version of your project that can never be edited or deleted," though a researcher can later "issue a withdrawal of it," leaving only basic metadata behind.

This is the clearest non-match, among the three systems checked against question-c2pa-opa-preregistration-append-only-log-criterion, to the narrow append-only-log-as-truth criterion already confirmed for CANONIC, ActiveGraph, and R-LAM (claim-canonic-deliverable-is-an-append-only-evidence-ledger, claim-activegraph-rebuilds-babyagi-on-event-log, claim-rlam-third-noncitng-subfield-append-only-log-with-verdict-separation). CANONIC's own related-work table groups preregistration among its precedents (claim-canonic-situates-its-ledger-in-a-named-immutability-lineage).