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 0x58e58a376d4320d5f4fbf79e0e28a46649bddd1d484edc4b5b38ae15e56e57d7. 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/c984798c-ea0d-41eb-bdf6-93f227507a19.json and https://artists.proofprofile.net/proofs/artist/c984798c-ea0d-41eb-bdf6-93f227507a19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
On the way to the animal farm field trip
I saw the rain falling outside the window
Sherlock Holmes couldn't solve the problem
What happens when you fall in love at first sight
Sphinx and the Great Adventure of Reasoning
Take my mom's hand and look around the market
Put on your new shoes and take a pleasant walk
Surfing board that cuts through the waves