Radikal () was a daily liberal Turkish language newspaper, published in Istanbul. From 1996 it was published by Aydın Doğan's Doğan Media Group. Although Radikal did not endorse a particular political
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 0x7c008ee92f9889bd2ff2872eccd6b6fb284670730b41b72a29a35bd8b324dfd1. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a24cd033-6583-4156-96f7-9d5ddd7d997a.json and https://artists.proofprofile.net/proofs/artist/a24cd033-6583-4156-96f7-9d5ddd7d997a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).