Mortimer is an English surname. Norman origins The surname Mortimer has a Norman origin, deriving from the village of Mortemer, Seine-Maritime, Normandy. A Norman castle existed at Mortemer from an
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 0xd17714f9bd3f531d05d157d6cee5df3fbf9114380687f330c2aa914b1b04b4d4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b8e32f5-a780-4e3d-9599-fa270cb2fa17.json and https://artists.proofprofile.net/proofs/artist/4b8e32f5-a780-4e3d-9599-fa270cb2fa17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).