thumb|A children's toy called Shape-O, made by Tupperware, used for learning various shapes. A shape is a graphical representation of an object's form or its external boundary, outline, or external s
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 0x5cd25da01de9d29b04076bfbacb6786c5416f8b3efbdbf6887ce10fc93cb69dd. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf72597f-3669-4deb-bf8d-bf7d8b80bcc8.json and https://artists.proofprofile.net/proofs/artist/bf72597f-3669-4deb-bf8d-bf7d8b80bcc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
KUBITTAKE (feat. SHOUGEN & AYA a.k.a. PANDA)