Hispanoamérica is an administrative neighborhood () of Madrid belonging to the district of Chamartín. It has an area of . As of 1 March 2020, it has a population of 32,181. Several of the placenames
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 0xc9dfac3c03bb1d066a7aeadb9798eb2bf4ae78e4052497ba120d4169d184061c. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3aba3abd-034f-4e89-8903-19473b6f8aab.json and https://artists.proofprofile.net/proofs/artist/3aba3abd-034f-4e89-8903-19473b6f8aab.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.