Seguel () is a Spanish surname usually found in Chile and Argentina. Notable people with the surname include: Daniela Seguel (born 1992), Chilean tennis player Fernando Díaz Seguel (born 1961), Chile
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 0x9345eddd567cc5da685c9d6e061d20a9c79f489f728c41de3c01ec90e927261f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7460d0d6-b918-404b-8597-a304e3b7f209.json and https://artists.proofprofile.net/proofs/artist/7460d0d6-b918-404b-8597-a304e3b7f209.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.