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 0x6db1a051c25d3978a2ef84432fed355c84d9247562deb080f1a557bcefee8829. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27cbb4a2-801e-4864-8bdc-e074631f99e2.json and https://artists.proofprofile.net/proofs/artist/27cbb4a2-801e-4864-8bdc-e074631f99e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cities Of Turkey, Vol.1: Arz-ı Rum (Erzurum)
Cities Of Turkey, Vol. 2: Akronion (Afyonkarahisar)
Cities Of Turkey, Vol. 3: Adonis (Adana)
Cities Of Turkey, Vol. 4: Cotyora (Ordu)
Cities Of Turkey, Vol. 5: Vadi Leman (Adıyaman)
Cities Of Turkey, Vol. 6: Karaköse (Ağrı)
Cities Of Turkey, Vol. 7: Amasiyye (Amasya)
Cities Of Turkey, Vol. 8: Zephyrion (Mersin)
Cities Of Turkey, Vol. 9: İzmir (Smyrna)
Constantinopolis (Cities Of Turkey, Vol. 10)
Cities Of Turkey, Vol.18: Muğla (Mobolia)
Amisos: Cities of Turkiye, Vol. 12 (Samsun)