thumb|Baku Street at Noon (1861) by Alexey Bogolyubov, depicting shadows from the sun at its highest point over the city of Baku Noon (also known as noontime or midday) is 12 o'clock in the daytime.
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 0x47a0f7fccca96f4d0d25a1a99377e7ced54bc6d4087e590a3e89dd92d848011d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d81b843-0bc4-40fa-9b03-991137a6b94b.json and https://artists.proofprofile.net/proofs/artist/3d81b843-0bc4-40fa-9b03-991137a6b94b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).