Frenkel is a surname. Notable people with the surname include: Aaron G. Frenkel (born 1957), Israeli entrepreneur and philanthropist Ana Balog Frenkel (1930–1945), Uruguayan Jewish Holocaust victim
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 0x01e6c680d9ece2cc6c341c1204cbf45da741e40c61346f9a487d36827c3b55b1. 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/8199a0e6-a0b6-4a03-b7b2-9a532dc1171a.json and https://artists.proofprofile.net/proofs/artist/8199a0e6-a0b6-4a03-b7b2-9a532dc1171a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
II. Warum Betrübst Du Dich, Mein Herz? BWV 138, Choral (Coro): Weil Du Mein Gott Und Vater Bist
Holland Boys Choir, Netherlands Bach Collegium
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 0xa0d71ad5ff1eaafa53fa8f1d4a04102d4672bffce111b927052f3d365158794c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLN580536672.