This paper addresses the first single-event experimental confrontation of the black-hole Record-Relay framework on GW250114. The earlier Record-Relay sequence developed the interpretation of black holes as record-and-relay stations, derived post-merger relay coordinates, and built detector-facing constraints through stacked gravitational-wave searches. But one question remained unresolved: when the loudest available black-hole merger is examined directly, does the predicted delayed relay coordinate show a measurable burst, or does the event place a quantitative bound on the strong version of the framework? The paper develops a destination-fixed single-event test. The central claim is not that a record-relay burst has been detected, nor that general relativity is replaced. Instead, the paper asks whether a coordinate fixed before confronting the data can be carried into a standard gravitational-wave analysis and tested against real H1 and L1 strain. The framework supplies where to look; the downstream analysis uses ordinary detector-facing tools, matched filtering, off-source background estimation, injection recovery, and reproducibility checks. Three main results anchor the paper. First, one horizon coordinate predicted by the same Kerr-remnant input map is externally corroborated: the predicted horizon frame-dragging frequency agrees with the independent direct-wave measurement reported for GW250114. This does not prove the record-relay interpretation, because the measured quantity is a generic Kerr horizon quantity, but it does anchor the coordinate-input layer used by the framework. Second, the entropy-set delayed relay coordinate is tested directly on the real H1 and L1 strain at the predicted post-merger time. Third, the delayed burst is not observed, and the strong relay version is converted into a quantitative single-event amplitude bound. The evidential structure is deliberately conservative. The direct-wave agreement is treated as coordinate corroboration, not relay detection. The delayed-burst null is treated as a measurement and upper limit, not as a failure of the analysis. The strong relay version is ruled out for this event, while weak relay amplitudes remain below the present detector reach. The correct conclusion is therefore not discovery, and not theory confirmation, but favorable coordinate confrontation plus a strong single-event constraint. The mathematical layer is closed by inheritance rather than refitted. The event coordinates are not tuned to the strain after the fact. They are computed from the measured remnant mass and spin using the parent Record-Relay coordinate map. The direct-wave measurement checks one horizon coordinate of that map, while the delayed-burst search tests the framework-specific entropy-delay claim. The paper therefore separates generic Kerr consistency from the record-relay-specific hypothesis: the former is externally anchored, while the latter remains the tested and still-undetected sector. The detector-facing layer is separated into several evidential levels. The first level is closed-form coordinate reproduction: the horizon frequency, dominant ringdown scale, delayed relay time, and fractional relay target are fixed before the real-strain search. The second level is injection recovery: a strong relay would be visible in this event at high expected network strength. The third level is the real-strain readout: the observed on-source statistic lies in the lower bulk of the off-source background, showing no excess at the predicted coordinate. The fourth level is amplitude bounding: the null result is converted into a conservative single-event upper limit on the relay coupling. The comparison layer distinguishes the record-relay burst from other GW250114 horizon signals. The direct wave is prompt and tied to horizon frame dragging. The ultra-compact-object echo is delayed but model-independent and searched over a different time window. The ordinary Kerr ringdown and nonlinear ringdown modes live in the prompt post-merger epoch. The record-relay burst is different from all of these: it is a single delayed burst at an entropy-set time, fixed in advance by the framework. The paper therefore classifies GW250114 post-merger horizon signatures by the physical quantity that sets their timescale. The null result also clarifies the future test. A phase-marginalized single-event search can bound strong relay amplitudes, but a deeper coherent search requires sharper remnant-spin information. The relay phase is highly sensitive to the remnant spin, so current spin uncertainty blocks the most powerful coherent channel. The decisive weak-relay test is therefore a next-generation problem: higher signal-to-noise events, improved remnant-spin precision, and network-level coherent analysis with future detectors such as the Einstein Telescope and Cosmic Explorer. The conclusion is that Paper 27 does not detect a record-relay burst, but it substantially sharpens the empirical status of the Record-Relay sub-series. It brings a closed, destination-fixed coordinate framework into contact with the loudest available black-hole merger, finds that one generic horizon coordinate agrees with an independent measurement, tests the framework-specific delayed coordinate with real strain, obtains a robust null, and converts that null into a quantitative single-event bound. The result is best described as an externally anchored coordinate test and a strong-version exclusion, with weak relay amplitudes left open for next-generation gravitational-wave astronomy. Keywords: black holes, gravitational waves, GW250114, record-relay framework, horizon coordinate, direct wave, frame dragging, Kerr black hole, ringdown, delayed burst, scrambling delay, Bekenstein-Hawking entropy, matched filtering, PyCBC, H1 strain, L1 strain, off-source background, injection recovery, amplitude bound, single-event test, Einstein Telescope, Cosmic Explorer.
Taekyung Lee (Wed,) studied this question.