Carrera Séptima (Seventh Street), also known as Eduardo Posada Flórez Avenue, is one of the principal transit arteries which crosses the eastern side of Bogotá north and south. It is the most importan
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 0x220854c2015aa59b234448b8f38eeef840a72daee367d79cc44b463b9eaeb1b2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4798a1f-addf-4c26-a3dd-bc0482e3dcc3.json and https://artists.proofprofile.net/proofs/artist/f4798a1f-addf-4c26-a3dd-bc0482e3dcc3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.