{"id": "urn:uuid:716accff-0363-410e-9d88-57d862e04a75", "type": ["VerifiableCredential", "OpenBadgeCredential"], "proof": {"type": "Ed25519Signature2020", "created": "2026-07-19T19:30:31Z", "proofValue": "z24cuFpuy8gvUFaTL15wJtCgZvRzmtTW9wSdBMbrVK9xBVUobWJyGum65B4hGZ6yWDGKq94s4kGFNPh5BiguDHrvd", "proofPurpose": "assertionMethod", "verificationMethod": "did:key:z6MkfwJEckNVbaLwbCETHMYkpfb7g2Nnvqn78ASyrYJfqvow#z6MkfwJEckNVbaLwbCETHMYkpfb7g2Nnvqn78ASyrYJfqvow"}, "issuer": {"id": "did:key:z6MkfwJEckNVbaLwbCETHMYkpfb7g2Nnvqn78ASyrYJfqvow", "name": "MIT Learn", "type": ["Profile"], "image": {"id": "https://learn.mit.edu/images/mit-red.png", "type": "Image", "caption": "MIT Learn logo"}}, "@context": ["https://www.w3.org/ns/credentials/v2", "https://purl.imsglobal.org/spec/ob/v3p0/context-3.0.3.json", "https://w3id.org/security/suites/ed25519-2020/v1"], "validFrom": "2026-07-19T19:30:31Z", "credentialSubject": {"type": ["AchievementSubject"], "identifier": [{"salt": "not-used", "type": "IdentityObject", "hashed": false, "identityHash": "Hermanus Lambertus Grewar", "identityType": "name"}], "achievement": {"id": "https://learn.mit.edu/courses/course-v1:UAI_SOURCE+UAI.ST.1", "name": "AI and Sustainability: Transportation", "type": ["Achievement"], "image": {"id": "https://ol-mitxonline-app-production.s3.amazonaws.com/original_images/UAI-9-transpo-sust.png", "type": "Image", "caption": "MIT Learn Certificate logo"}, "criteria": {"narrative": "- Learn how predictions about demand can feed directly into smarter planning and operational decisions\r\n- Use AI tools to create realistic practice scenarios that help planners prepare for different transportation challenges\r\n- Solve classic transportation problems, like finding the shortest delivery route or matching riders to drivers, using mathematical optimization models\r\n- Understand the difference between long-term planning decisions, medium-term scheduling, and day-to-day operations in transportation\r\n- Evaluate how modeling choices affect riders, system performance, cost, and the environment"}, "description": "Hermanus Lambertus Grewar has successfully completed all modules and earned a Course Certificate in AI and Sustainability: Transportation.", "achievementType": "Course"}, "activityEndDate": "2026-07-19T19:30:31Z", "activityStartDate": "2026-05-05T19:51:28Z"}}