María Sabina Magdalena García (22 July 1894 – 22 November 1985) was a Mazatec sabia (wise woman) and poet who lived in Huautla de Jiménez, a town in the Sierra Mazateca area of the Mexican state of Oa
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 0x7d2febf5f158f1b47b22abf788a21e71ee446b27d97e8b9ea41c216d5ee2b767. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f0e5e2e-b178-4d3c-a549-f4d3676305b9.json and https://artists.proofprofile.net/proofs/artist/9f0e5e2e-b178-4d3c-a549-f4d3676305b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).