DN28 () is a national road in Romania, located entirely within the historical region of Moldavia. The road starts in Săbăoani, near Roman and crosses through the cities of Târgu Frumos and Iași, endin
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308945a6a8d9f41b39fda940dacf00511e7dbf32f7197e797d1973203ca8717e. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ba2a989-1edd-409b-aced-6c07f282ddc6.json and https://artists.proofprofile.net/proofs/artist/0ba2a989-1edd-409b-aced-6c07f282ddc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).