Mathilde is an alternative spelling of the names Matilde or Matilda, and could refer to: Mathilde Dolgopol de Sáez (1901 –1957), Argentinian vertebrate paleontologist Mathilde, Abbess of Essen (949–
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9ea1917e94c212439c94e9bf31e8590ccae0f8bedd798f47d30f871dcfd2af. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbafe94d-b885-480e-81ae-1eb381bb7a56.json and https://artists.proofprofile.net/proofs/artist/cbafe94d-b885-480e-81ae-1eb381bb7a56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).