thumb George Francis Miles (22 April 1852 – 15 July 1891) was a London-based British artist who specialised in pastel portraits of society ladies, also an architect and a keen plantsman. He was the ar
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 0xd351c75b36acc29afb355915baaaf65a9e1b0ca011272f11ef6fc7b6e1fef9c3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/689d054e-c714-43d2-b560-bc0e9fa7e1f4.json and https://artists.proofprofile.net/proofs/artist/689d054e-c714-43d2-b560-bc0e9fa7e1f4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.