Kalinki is a village in the administrative district of Gmina Masłowice, within Radomsko County, Łódź Voivodeship, in central Poland. It lies approximately north-east of Masłowice, east of Radomsko,
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 0xbc167f9922cc422ea1c9e40da42c4059f4a8695580ea8724e0a2982237fdfd27. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21bf709d-f665-4686-b459-dfa461dca9e7.json and https://artists.proofprofile.net/proofs/artist/21bf709d-f665-4686-b459-dfa461dca9e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).