Senet or senat (; cf. Coptic , 'passing, afternoon') is a board game from ancient Egypt that consists of ten or more pawns on a 30-square playing board.Crist 2019 p. 107 The earliest representation o
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 0xcb5d6b7f36d52ae81f06e260af5abc84307599e07b7ff96343110c8953a8aa31. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a605d294-2ff8-45c2-98a2-ba584c9f6964.json and https://artists.proofprofile.net/proofs/artist/a605d294-2ff8-45c2-98a2-ba584c9f6964.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).