Kozy (German: Seiffersdorf, Seibersdorf, Kosy (1941–45); Wymysorys: Zajwyśdiüf) is a large village with a population of 12,457 (2013) within Bielsko County, located in the historical and geographi
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 0xf3e79b071ee71c32c1968d640421ab921d6de251dab40ef5d36e8023c0c025f0. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e297d60-d2f7-4502-8ee9-7bb18dd4f295.json and https://artists.proofprofile.net/proofs/artist/5e297d60-d2f7-4502-8ee9-7bb18dd4f295.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).