William de Courcy may refer to: William de Courcy (died circa 1114), Anglo-Norman baron William de Courcy (died before 1130), son of the above William de Courcy (died 1171), son of the second Will
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 0x78566162361a400e3c21985afc3766428d2f9ec8dfc42bcc459f3c4f3b0e732f. 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/488efed1-58d6-4d08-8baa-ad35f80a257f.json and https://artists.proofprofile.net/proofs/artist/488efed1-58d6-4d08-8baa-ad35f80a257f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).