Surat () is a city in the western Indian state of Gujarat. The word Surat directly translates to face in Gujarati, Hindi and Urdu. Located on the banks of the river Tapti near its confluence with the
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 0x5889d7f0f336105b807eaf848c9ac68856166929c1ded3e9419b9c96c63eba0d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e6c0fd9-7c00-4e96-acf5-e8c6e68079e6.json and https://artists.proofprofile.net/proofs/artist/6e6c0fd9-7c00-4e96-acf5-e8c6e68079e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).