Marzio is a comune (municipality) in the Province of Varese in the Italian region Lombardy, located about northwest of Milan and about north of Varese. The origin of the name "Marzio" could derive f
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 0x490fcbe8c3795fd1ae2b8830f089ec61dc4e02b7481961adb85e73b50e344dc3. 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/8636e7b7-d802-49c8-81f6-b8912b916ddf.json and https://artists.proofprofile.net/proofs/artist/8636e7b7-d802-49c8-81f6-b8912b916ddf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).