Harman Singh (born 19 May 2000) is an Indian cricketer. He made his first-class debut on 27 January 2020, for Uttarakhand in the 2019–20 Ranji Trophy. References External links Category:2000 birt
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 0xc4477ca2ca36c834023c6e9c971ec3bbe27f18efa03d27bd0ef00042a1049734. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c131e6b-abad-4238-b567-df0ae4aaf8f7.json and https://artists.proofprofile.net/proofs/artist/4c131e6b-abad-4238-b567-df0ae4aaf8f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).