John Almeida (1571 – 24 September 1653) was a Jesuit missionary. Childhood He was born in London. His real surname was Meade, but it was changed to Almeida, because of his Portuguese surroundings.
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 0xd6db5fb4e2f7f6e9201be6907aae007091cba181a008df367778b3add8650116. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31d15051-498c-436e-9a1b-89277ec0fe40.json and https://artists.proofprofile.net/proofs/artist/31d15051-498c-436e-9a1b-89277ec0fe40.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.