Metro may refer to: Geography Metro City (Indonesia), a city in Indonesia A metropolitan area, the populated region including and surrounding an urban center Public transport Rapid transit, a pas
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 0x27164a5bc8f7b4c1b594cbea3858fc0234e4dcf73175a542198f94552052d1bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7388c311-ac60-4a64-95e2-6097605f2268.json and https://artists.proofprofile.net/proofs/artist/7388c311-ac60-4a64-95e2-6097605f2268.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).