{"certificate":{"v":1,"subject":"lib.umich.edu","certified":true,"report":"https://crawlcheck.io/r/mdu3j3lfk8","record":"mdu3j3lfk8","manifest":"69fe0b27b1c7b22cb691add521c03fad44f2d0870fa7f982194d84fe32733abe","measured_at":"2026-11-05T07:02:17.439Z","issued_at":"2026-11-10T01:05:45.700Z","expires_at":"2026-11-12T07:02:17.439Z","rule_pack":"sv34","criteria":[{"id":"fresh","ok":true},{"id":"current_rules","ok":true},{"id":"answered","ok":true},{"id":"crawlers_reach","ok":true},{"id":"no_serious","ok":true},{"id":"robots_sound","ok":true},{"id":"not_listed","ok":true},{"id":"evidence","ok":true}],"status":"https://crawlcheck.io/api/v1/certificate/status?domain=lib.umich.edu&record=mdu3j3lfk8"},"signature":{"alg":"Ed25519","kid":"1hHmE3fo1rg5Ig70wuFtJ5wBc7G-sUTgUJkxyPWFRps","message_prefix":"crawlcheck-certificate-v1\\n","signed":"prefix + canonical JSON of certificate (keys sorted, no whitespace)","sig":"GZhjkdnfqEiEeTxPTf0I--PTBXNbIPk9mngwx-CEck5JhqfGzRJ552a6x757ZL2POFmGAMnGx5qbDVqcuLjEDQ","key_directory":"https://crawlcheck.io/.well-known/http-message-signatures-directory"},"criteria":[{"id":"fresh","label":"Measured in the last 7 days","ok":true,"why":"measured 4.7 days ago"},{"id":"current_rules","label":"Scored under the current rule pack","ok":true,"why":"record sv34, current sv34"},{"id":"answered","label":"The site answered CrawlCheck","ok":true,"why":"homepage answered"},{"id":"crawlers_reach","label":"Every crawler the site allows reached the page","ok":true,"why":"15 of 15 answered"},{"id":"no_serious","label":"No high or critical finding","ok":true,"why":"5 finding(s), none high or critical"},{"id":"robots_sound","label":"robots.txt is served and means what it says","ok":true,"why":"no robots.txt defect"},{"id":"not_listed","label":"Not listed as malware or phishing","ok":true,"why":"no listing found in the lists read for this record"},{"id":"evidence","label":"The evidence is kept and signed","ok":true,"why":"manifest 69fe0b27b1c7… signed by 1hHmE3fo1r…"}],"page":"https://crawlcheck.io/certificate/lib.umich.edu","seal":"https://crawlcheck.io/certificate/lib.umich.edu.svg","history":{"since":"2026-11-05","from":"2026-09-24","measurements":1,"days_tracked":6,"days_certified":6,"days_not_certified":0,"days_unmeasured":0,"streak_days":6,"recent":[{"day":"2026-11-05","state":"certified"},{"day":"2026-11-06","state":"certified"},{"day":"2026-11-07","state":"certified"},{"day":"2026-11-08","state":"certified"},{"day":"2026-11-09","state":"certified"},{"day":"2026-11-10","state":"certified"}]},"note":"a certificate states measured conformance on one day; it is free, never sold, never a grade, and says nothing about the business beyond what a crawler received"}