Hồ Văn Cường (born 15 January 2003) is a Vietnamese professional footballer who plays as a right back for V.League 1 club Sông Lam Nghệ An and the Vietnam national team. Club career Văn Cường started
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 0xd01c4018023e65f85a85fab0e16a57580e77cf7f54a2582af99c0848cfbf9b14. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2aba973b-9d69-4fee-a2e6-31addb3b2c23.json and https://artists.proofprofile.net/proofs/artist/2aba973b-9d69-4fee-a2e6-31addb3b2c23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).