Harmanpreet Singh (born 6 January 1996) is an Indian field hockey player and captain of the national hockey team. He plays as a defender, is a penalty corner specialist, and is regarded as one of 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 0x7f7db0085deb308fbb78b530f0faaa9fec83cc6aa201db5077184a239f489c4a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93cda8f2-71c0-445c-89ed-5fec60f979d1.json and https://artists.proofprofile.net/proofs/artist/93cda8f2-71c0-445c-89ed-5fec60f979d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).