Eusebia may refer to: Eusebia (empress) (died 360), second wife of the Roman emperor Constantius II Ereleuva or Eusebia (died c. 500), the mother of Theoderic the Great St. Eusebia (disambiguatio
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 0x63bd62bd3db0a7e196392e92b46c8796810d464c4b67653aea1637733e92d3c8. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb076eb0-fa6f-4c22-85e5-5d5ed6a35133.json and https://artists.proofprofile.net/proofs/artist/cb076eb0-fa6f-4c22-85e5-5d5ed6a35133.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).