The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Yamaha's WXC-70A was announced 27 August 2026 with availability stated only as November 2026 (https://www.ecoustics[3].com/products/yamaha-wxa-70a-wxc-70a/). With no on-sale day published, the pin is dated to the last day of that month, 30 November 2026, as an estimate.
TWICE's headline, "Yamaha[1] Expands Hi-Fi Lineup With New Compact Streaming Components" and stored 3 September 2026 publish date, precede the pin's stored 8 September 2026 date by five days, consistent with initial product-line coverage, though the page itself could not be fetched (blocked domain).
eCoustics' product page for the Yamaha[1] WXA-70A/WXC-70A, stored as published 27 August 2026, predates the pin's stored 8 September 2026 date by about two weeks as early product listing coverage; the page itself could not be fetched (blocked domain).
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.