Baruc ( ; also known as Barruc, Barrog or Barry) was a 6th-century Welsh saint. Saint Baruc, who was a disciple of Saint Cadoc, forgot to bring the latter's reading matter with him on a journey from
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 0xf35a2c54c8c8c96615d59e2774ddde0f9e2d7b2fda369d470719cd6173068883. 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/c9fc3f21-7a8d-4645-a924-2a927e3edbb5.json and https://artists.proofprofile.net/proofs/artist/c9fc3f21-7a8d-4645-a924-2a927e3edbb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).