Kutina is a town in central Croatia, the largest settlement in the hilly region of Moslavina, in the Sisak-Moslavina County. The town proper has a population of 13,735 (2011), while the total municipa
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 0xc688c2da96dc81c07fff8bf712c6e1b97eb76733fdddc9c7f1c32985665ac094. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70cd209a-afdf-4870-84f2-61dbae20d4c1.json and https://artists.proofprofile.net/proofs/artist/70cd209a-afdf-4870-84f2-61dbae20d4c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).