Zalmen Mlotek (; born June 15, 1951, in the Bronx, New York) is an American conductor, pianist, musical arranger, accompanist, composer, and the Artistic Director of the National Yiddish Theatre Folks
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 0x17949f36880aebc90f2d2e2a28369ba5c8559a33c458fcf9542b3baaa7e2b37d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88bd7bc7-e9ac-40bd-8fd8-5bee53cddd3c.json and https://artists.proofprofile.net/proofs/artist/88bd7bc7-e9ac-40bd-8fd8-5bee53cddd3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pearls of Yiddish Song | פּערל פֿון ייִדישן ליד
In Love and In Struggle: The Musical Legacy of the Jewish Labor Bund
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4f58532ef80a82dad17fbdc21552b6aa5699c827786ab389ada70bec387526. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6P2293104.
Mir Trogn A Gezang: A Collection of Yiddish Folk, Art and Theatre Songs