Oona Laurence (born August 1, 2002) is an American actress. She is best known for the roles of Leila Hope in Southpaw and Matilda Wormwood in Matilda on Broadway alongside Bailey Ryon, Milly Shapiro,
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 0xf30507d13dc4acf616b25e7efb1b435ee9431a16616cb41ba1aea22c01609f8e. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59103c5c-d57e-4dd7-af68-0821a8a4da25.json and https://artists.proofprofile.net/proofs/artist/59103c5c-d57e-4dd7-af68-0821a8a4da25.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.