Kadro was an influential left-nationalist and left-Kemalist magazine published in Turkey between January 1932 and December 1934. The title of Kadro translates from Turkish as "cadre" (referring to the
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 0x95a10111829e923aa73d0be8c6c2ed2a535f8bb723ca3f3ea5cf3b1271af73c2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86fba710-f992-46b2-8bfc-84b582c37812.json and https://artists.proofprofile.net/proofs/artist/86fba710-f992-46b2-8bfc-84b582c37812.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).