Tulian (, also Romanized as Ţūlīān, Tūleyān, Tūlīān, and Tūlīyān) is a village in Dehdasht-e Sharqi Rural District, in the Central District of Kohgiluyeh County, Kohgiluyeh and Boyer-Ahmad Province, I
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 0xda3c5b6006cd58bc8d81ceed8e3bba8314371e3ffb6374e89138572545b18ea2. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1413b149-5aa2-4b9f-9aa6-c1e9589d9296.json and https://artists.proofprofile.net/proofs/artist/1413b149-5aa2-4b9f-9aa6-c1e9589d9296.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).