thumb|Red Kite at Bwlch Nant yr Arian, Wales, a local feeding ground. The red kite (Milvus milvus) is a bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as
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 0xdb94c118d8e0a71e9fede3cb6241226b97229c155f635155150c8343fdda0e19. 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/d5bdc323-da6a-4a4d-8cc5-fa1de9bf0730.json and https://artists.proofprofile.net/proofs/artist/d5bdc323-da6a-4a4d-8cc5-fa1de9bf0730.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).