Maria Isabel Coelho Santos (born 12 February 1968)"Partido Socialista – Eleições para a Assembleia da República (Círculo Eleitoral do Porto)" . Retrieved 21 November 2017. is a Portuguese politician
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 0xc343d44dea2e36b75d31d85b56f2faf2c48a1b8fe57a740b097786dd014fc1f9. Chain 2 (Bitcoin): anchored in block 953978 (2026-06-16T17:11:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bc403ae-972a-42c2-b770-a36078b6016d.json and https://artists.proofprofile.net/proofs/artist/2bc403ae-972a-42c2-b770-a36078b6016d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.