Julian Sellmeister, also known as Yung Hurn (born 18 January 1995) is an Austrian hip-hop-musician from the Viennese district Donaustadt. Since 2016 he has also appeared under the name of K. Ronaldo a
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 0x9cc669f3c73f3ed079067bea3c846fa9fa1fbca9bc39942edfa18541d4588bb8. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47ef0135-4c6a-45cb-b3b4-0b57194a144a.json and https://artists.proofprofile.net/proofs/artist/47ef0135-4c6a-45cb-b3b4-0b57194a144a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).