Milan () is the regional capital of Lombardy, in northern Italy, and the seat of the Metropolitan City of Milan. It is the second-most populous city in Italy after Rome, with a population of 1.36 mill
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f271247e3d9b9e6d0b8e1ca0202ac5677268ee12f12d3224ae98bf6cfc294fc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d0a53f6-0cb7-4287-a357-b2125aa70d1a.json and https://artists.proofprofile.net/proofs/artist/7d0a53f6-0cb7-4287-a357-b2125aa70d1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).