MASKO is an underground station on the M9 line of the Istanbul Metro. It is located on Süleyman Demirel Boulevard in the Ziya Gökalp neighbourhood of Başakşehir. It was opened on 29 May 2021. Statio
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 0x85d266620a354eb105bb8302ea7d69f2362a87017e2ec6e5379a811a58652ea1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e6c95b3-4a77-400a-af46-3bf5ca3f8213.json and https://artists.proofprofile.net/proofs/artist/3e6c95b3-4a77-400a-af46-3bf5ca3f8213.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).