Dipankar Roy (; born 7 November 1982) is a retired Indian professional footballer who played as a midfielder. He played most of his professional career for East Bengal in the National Football League
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 0xa62171b94155ead64b8425037ed944c9123895962b490e8ff780acbe9f92cf0b. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1394b017-ef43-4042-9edc-ac7b9280aa7c.json and https://artists.proofprofile.net/proofs/artist/1394b017-ef43-4042-9edc-ac7b9280aa7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).