Israel Melnikoff (September 22, 1902 – July 10, 1994), known professionally as Robert Mellin, was a Russian-born American composer, lyricist, and music publisher. Born in Kiev (now Ukraine), he was ra
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 0x9e46750b166f3d20084214a74b9b80d12b0ca4570aefaffa1e6a36a3975ce3f3. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3107b6fe-69d5-4d7b-b30f-a2c9f728387b.json and https://artists.proofprofile.net/proofs/artist/3107b6fe-69d5-4d7b-b30f-a2c9f728387b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).