Medina, officially al-Madinah al-Munawwarah, also known as al-Madinah an-Nabawiyyah and Taybah and known in pre-Islamic times as Yathrib, is the capital and administrative centre of Medina Province in
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 0x962c68d43ffeb679ec16b03599c7af8057b619f86069e629152a5612b4f0e4dc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59642f14-c3df-4379-9122-224ba6a7f171.json and https://artists.proofprofile.net/proofs/artist/59642f14-c3df-4379-9122-224ba6a7f171.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).