Yvan Le Bolloc'h (; born 20 December 1961) is a French television and radio host, actor and musician. Biography Yvan Le Bolloc'h began as a teacher for four years in Brittany. He worked regularly wit
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 0x11ebef6b90bf0f73a21746df775a58a406a9b2748272df107a71f873f0bca0b7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dface780-7290-4ada-9489-4fbb39dc375a.json and https://artists.proofprofile.net/proofs/artist/dface780-7290-4ada-9489-4fbb39dc375a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).