John Greaves (1602 – 8 October 1652) was an English mathematician, astronomer and antiquarian. Education Educated at Balliol College, Oxford, he was elected a Fellow of Merton College in 1624. He s
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 0x96ef1a8fb6f9454692d0de023b8c45ee2ee5d58a9a80045498b54f13ac30d245. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f28533a-b16d-45d7-9099-0bc9a8e26780.json and https://artists.proofprofile.net/proofs/artist/5f28533a-b16d-45d7-9099-0bc9a8e26780.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La petite bouteille de linge (Little Bottle of Laundry)
Les molécules fidèles (D'après "Émaux et Camées" de Théophile Gautier)