Red Square () is one of the oldest and largest squares in Moscow, Russia. It is located in Moscow's historic centre, along the eastern walls of the Kremlin. It is the city's most prominent landmark, w
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 0xc1749d47adaeeff7ab675a11a290d6ce19ce098e0972efc858da410b3818123b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea6911b6-fbee-4741-974b-0fd7a79e96b7.json and https://artists.proofprofile.net/proofs/artist/ea6911b6-fbee-4741-974b-0fd7a79e96b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).