Tijuana is the most populous city of the Mexican state of Baja California, located on the northwestern Pacific Coast of Mexico. It is the municipal seat of the Tijuana Municipality, the hub of the Tij
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 0x59359f572906a9a66c073561d5d303d380378b2791cbefa79e230b3ceb0ae229. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7eac428-3e9b-4477-8911-dcefc120c38c.json and https://artists.proofprofile.net/proofs/artist/a7eac428-3e9b-4477-8911-dcefc120c38c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).