Core or cores may refer to: Science and technology Core (anatomy), everything except the appendages Core (laboratory), a highly specialized shared research resource Core (manufacturing), used in c
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 0x4bd04bc74b2840c3538284cae9ecb2cd159b2da72f57d999ce58f21129a4cbd8. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/869a333a-e6b8-4b23-b32c-3d06bb97d27a.json and https://artists.proofprofile.net/proofs/artist/869a333a-e6b8-4b23-b32c-3d06bb97d27a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).