thumb|Cover Mavo #3, collection of Machiya City Museum of Graphic Art thumb|MAVO Dance Mavo (often styled MaVo or MAVO) was a radical Japanese art movement of the 1920s. Founded in 1923, Mavo was pro
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 0xf9ee724bbe6c7ebc568df14f11b5de1857e99d847e828d68c1dc11380986f47d. 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/eac2c481-045d-41bf-8075-85727111b5a6.json and https://artists.proofprofile.net/proofs/artist/eac2c481-045d-41bf-8075-85727111b5a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).