thumb|Tea served in a tea room at the Shantytown Heritage Park in New Zealand thumb|Tea house in Moscow, 2017 A teahouse or tearoom (also tea room) is an establishment which primarily serves tea and
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 0x562c4059e134731f86e3a37e7a6227a73d700482454c4308c871d6fb25370c3a. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb536c3b-ee56-4521-a6e4-632e5fcf4fb0.json and https://artists.proofprofile.net/proofs/artist/eb536c3b-ee56-4521-a6e4-632e5fcf4fb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).