Zvonko () is a masculine given name. Notable people with the name include: Zvonko Bego (1940–2018), Croatian footballer Zvonko Bezjak (1935–2022), Croatian hammer thrower Zvonko Bogdan (born 1942), S
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 0x50135b7fedb6e595cd5dcfc293e1502c51f6613f163d841a6a1f8471c8978bdc. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b45d2652-3643-4041-bf5c-f15890bba881.json and https://artists.proofprofile.net/proofs/artist/b45d2652-3643-4041-bf5c-f15890bba881.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).