Marilynne Summers Robinson (born November 26, 1943) is an American novelist and essayist. Across her writing career, Robinson has received numerous awards, including the Pulitzer Prize for Fiction in
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 0x5b9fd47a8b623e23fd10d6e2ff1a5a96ba239d1c2fe9aa745726c356ef97cfce. 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/5868ddb6-4469-450d-8e37-f0b84974f856.json and https://artists.proofprofile.net/proofs/artist/5868ddb6-4469-450d-8e37-f0b84974f856.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).