Simcha Leiner (born 1989) is an American singer, composer and entertainer in the Contemporary Jewish religious music industry. Career Leiner started singing at weddings in 2008. In 2014, he officia
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 0x0e8584c6f49cf2a6946c64e052699d64d40fb9aaa413c5ae3994e3d2683d8f98. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f7390a2-0c02-4f1b-a4fa-8467edbae6ee.json and https://artists.proofprofile.net/proofs/artist/0f7390a2-0c02-4f1b-a4fa-8467edbae6ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).