Almendra may refer to: Places Almendra, Salamanca, a village and municipality in the province of Salamanca, Spain Almendra, Portugal, a civil parish in the municipality of Vila Nova de Foz Côa, Por
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 0x19f47df66d6373d858d03aca5c9c01975b3c84eeb29088005ca5e0855b4782aa. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87e2f87f-fe62-4c4d-a316-1e4d0f60079c.json and https://artists.proofprofile.net/proofs/artist/87e2f87f-fe62-4c4d-a316-1e4d0f60079c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).