Belz (, ; ; ) is a small city in Lviv Oblast, western Ukraine, located near the border with Poland between the Solokiya River (a tributary of the Bug River) and the Richytsia stream. Belz hosts the ad
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 0x145275cd48146757cca23d3b774d0ed73df745b173e1cf05f6419d2aeced9944. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c5b988-4790-4e86-a84d-9d988258213b.json and https://artists.proofprofile.net/proofs/artist/d7c5b988-4790-4e86-a84d-9d988258213b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).