Eddy C. Bertin (26 December 1944 – 21 May 2018) was a Belgian author of adult and children's fiction, best known in the United States for his science fiction. He also wrote under the pseudonyms Edith
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 0xb8d8d030a35d3bfddeee34b40ac6304274aa41ee946dc7c4f7b69dbe94b2b0b3. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/298cbfd8-a13a-4240-9977-15a699dc9a4f.json and https://artists.proofprofile.net/proofs/artist/298cbfd8-a13a-4240-9977-15a699dc9a4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).