El Palma, known anciently as Lakamtuun, is an archaeological Maya site located in the Lacantún river of Chiapas in Mexico. El Palma or Lakamtuun was an ancient Mayan state of the Classic period that r
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 0x3e02070d14528fccad87570fb1fca838d07f0d679f11839ff3d896662b605e79. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8b01e0-b230-4972-91bc-04cc0f66e949.json and https://artists.proofprofile.net/proofs/artist/db8b01e0-b230-4972-91bc-04cc0f66e949.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.