The Signature Moves, the Gate Does Not

Verifiable credentials finish the cheap half of the problem, the checking; the gate is the right to confer standing, and that has not moved at all.

Nobody calls the admissions office anymore. In the United States the checking is done by one nonprofit clearing house, the National Student Clearinghouse, which reports covering 97 percent of enrolled postsecondary students and 96 percent of four-year degrees, and tells employers they can verify credentials instantly, around the clock. Whatever stands between a graduate in Lagos and a job in Berlin, the phone call to the registrar stopped being it years ago. The friction was removed. The queue did not get shorter.

That is where any argument for decentralized credentialing has to begin, because it pries apart two things a diploma does that are usually discussed as one. A credential records a judgment: someone competent examined this person's work and formed a view. A credential also confers standing: it entitles the holder to be considered, licensed, hired, believed. Cryptography can move the record anywhere at almost no cost, in a form the recipient can check without trusting the sender. It cannot move the standing, because standing is not information but a decision other people make about whose judgment counts. The gate is not the file. The gate is the right to confer, and the scarcity that makes conferral worth having.

The record really has moved, and the engineering deserves credit. On 15 May 2025 the World Wide Web Consortium published the Verifiable Credentials 2.0 family as a Recommendation: a way to express digital credentials that are, in the consortium's phrasing, "cryptographically secure, privacy respecting, and machine-verifiable". 1EdTech had built Open Badges 3.0 on the same data model a year earlier, releasing it on 29 May 2024. Universities were experimenting before either standard existed: MIT issued blockchain-anchored diplomas in a 2017 pilot offered to 111 graduating students, of whom 43 accepted, and the pitch from its technology partner was the market in fake MIT diplomas, while the registrar's own stated aim was letting graduates hold and share the record themselves. Nine years on, those diplomas are still verified through a portal MIT operates. The plumbing works. It has redistributed nothing.

Meanwhile the thing this case actually wants, a Lagos degree weighed on its merits, has been treaty law in Europe for a quarter of a century. The Lisbon Recognition Convention, adopted in 1997 and in force since February 1999, did what no file format can do: it reversed the burden of proof. A qualification from another party state must be recognised unless substantial differences can be shown, and the burden of showing them rests on the assessing body, not the applicant. The UNESCO Global Convention, adopted in Paris on 25 November 2019 and in force since 5 March 2023 on its twentieth ratification, carries that principle worldwide as the first United Nations treaty on higher education of global scope. That is decentralization of an enforceable kind, and it was won by negotiation between states, not by a signature scheme.

Then there is the demand side, where the argument gets uncomfortable. In February 2024 the Burning Glass Institute and Harvard Business School audited the wave of employers who had dropped degree requirements. Across more than 11,000 roles at large American firms between 2014 and 2023, removing the requirement raised the share of hires without a bachelor's degree by roughly 3.5 percentage points in those roles; scaled across the economy, fewer than one hire in 700 in 2023 was affected. Around 45 percent of the firms that made the announcement changed the posting and not the practice. Government does no better: Colorado, one of at least 26 states to move this way, hired 1,588 people without degrees into the reformed classifications in 2024, roughly the same share as the year before, while Maryland and Pennsylvania track applicants' education but not that of the people they hire. "Changing your hiring policy is, at best, the end of the beginning," Harvard's Joseph Fuller said of the findings.

Randall Collins saw the shape of this in 1979. The Credential Society argued that educational expansion had produced not mobility but credential inflation, and that credentials closed high-status occupations against newcomers rather than opening them. On this series' reading, that is the structural reason portability keeps disappointing its champions. A credential's value is partly its scarcity, so an instrument that makes credentials cheaper to issue, carry and check does not spread the advantage around. It debases the unit and pushes the real screening somewhere less visible: the school's brand, the internship, the referral, the accent. Part III of these papers described a democracy that distributed the right to choose the centre while the centre went on deciding. Credentialing is the same half-revolution. The record travels; the verdict stays home.

The strongest counter-case is the hardest case. Article VII of the Lisbon convention obliges parties to assess refugees' qualifications even when documents cannot be produced. The UNESCO Qualifications Passport weighs whatever documentation exists together with a structured interview conducted by trained credential evaluators; the Council of Europe's European passport for refugees works the same way, piloted in Athens from March 2017 on a method the Norwegian and British recognition offices had devised two years earlier. Here the case for portability is most urgent, and the working answer is not a ledger. It is expert human judgment, applied person by person, in a room. Even then the UNESCO passport states plainly that it "does not constitute a formal recognition". At maximum effort, the best instrument we have describes what someone knows and leaves the standing to others.

India shows the opposite tendency. Degrees, mark sheets and course credits are being consolidated into a National Academic Depository, launched in 2017 and reached through DigiLocker; its portal advertises more than a billion digital academic awards. Students gain convenience; the record also becomes more complete, more permanent and more central, held by the state rather than scattered across registrars. Digitization is not decentralization; often it is centralization with a better interface, and Part II of these papers named the mechanism: the ledger is how a centre makes the governed legible.

So what would count? Part V took Elinor Ostrom's design principles as the test: behaviour visible, verification cheap, rules changeable by the governed, exit real. Credentialing now passes the first two comfortably and fails the last two outright. No graduate can amend the rules by which a degree is read, and there is no exit from a labour market that reads it. The moves that would matter are unglamorous and social: employers accepting paid trials, work samples and apprenticeship in place of the proxy; professional bodies that examine competence directly and admit whoever passes; licensing that tests the job rather than the biography; and, as Part I insisted, the burden of proof resting on the gatekeeper. The person best placed to judge whether you can do the work is usually the person you would be doing it for. Push the judgment out to them, and the file will follow it anywhere.