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 0x90a2b0de2721ed1b96d3ca83358647305563e28a4b3c7bf8ce9b2018d262dd30. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7832b94b-0fbe-432f-842d-3a5a4c777966.json and https://artists.proofprofile.net/proofs/artist/7832b94b-0fbe-432f-842d-3a5a4c777966.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Taxidermy Flute-Cat & the Jazz Animals of Codwood