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other OP_RETURN ✓ Verified on-chain

University of Nicosia — first UNicDC blockchain certificate (DFIN-511, 2014)

Written to the chain on 12 Sep 2014, block 320,303.

Block
320,303
Written
12 Sep 2014
Size
39 B
Format
UNKNOWN
Transactions
1

About this artifact

University of Nicosia (Cyprus) — the first university to anchor academic certificates on Bitcoin, for its DFIN-511 'Introduction to Digital Currencies' MOOC. Beyond timestamping, UNicDC is a credential-management protocol — it also revokes previously issued certificates and records other certificate-lifecycle operations on-chain (later the Block.co spin-out), so it is not only a notary. This is the earliest UNicDC batch on-chain (block 320303, 2014-09-12), anchoring Merkle root f4f4f3dd52c8023dd855e9d22a46b303e82d09a0e9944d46dc06192d1c2cbbcf; its date matches the protocol's documented genesis. Two more batches followed within days, each from a fresh signing address — including the one CoinDesk reported on 2014-09-16 (tx cb4f0cf471ac262096162484f51abcf1a0a6a2c9db21a4e2f5abbe41860d3ca0, block 320803, 2014-09-15). UNIC later restarted the program in January 2017 from a dedicated address (1A94iDxxJijPvo8CjCWe4GLUfT6BGTWuUq, block 448967), which has issued 110+ batches since and migrated to the CRED-wrapped format in December 2017.

How it was stored

OP_RETURN explicitly marks an output as unspendable and lets it carry a small data payload. Unlike fake-address methods, it does not create a spendable-looking UTXO. That makes it the least deceptive standard way to place small data on-chain.

More about OP_RETURN
Proof · 1 transaction

Verified against the chain

Every byte shown here was read from these transactions. Open one in a block explorer to check it yourself.