Urius () was an Alemannic petty king in the 4th century AD. The Roman writer Ammianus Marcellinus reports that Julian crossed the Rhine at Mainz in 359 and concluded a peace treaty with the Alemannic
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5ca2fd5d6867acb09c661b5d2525711cf1dc7351fd5733c514e9629bc81b2d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd07b89f-147d-462c-b543-a9917d95e8d1.json and https://artists.proofprofile.net/proofs/artist/fd07b89f-147d-462c-b543-a9917d95e8d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).