Shlomo Simcha Sufrin, better known as Shlomo Simcha (Hebrew: שלמה שמחה) is a UK-born Canadian Hasidic Jewish cantor and singer. Shlomo Simcha began his career in a small kollel in Montreal, where he w
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 0xd6f0df149d7ebf0f92b6edec5e919fb860e6395f2a7672653893be72c72962d1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f899270c-fb4c-4935-baab-1163cdddb967.json and https://artists.proofprofile.net/proofs/artist/f899270c-fb4c-4935-baab-1163cdddb967.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xcc228a9a7ae6fb6932ce111e34ee96b7a6a62adc2c7a61a41bf4c7ab4f84eee5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA72421667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46fd64041c8356e72a68bf23ffdcd099e482c657188308cbc65c131ebcc0cd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFP2367385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a55b5be117adfae4c09218dce64c71f61daf52c8f85b8c767554f1036e88e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2130122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4540ef7bf0f858e7586088afed20486dd2eb9e56064a5dd884b7c418217056. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEM2130137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef0e39e42dee7effac3332e8c8ada673369a9a3f4ce89c0add3c46b8a6198d. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:03:25Z), 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/QZMEM2130128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc759f78fabb2908599ce2fecd685ed7f5a5db9a45147dd1d919a83fe499eb640. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1646031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfac56f0d64176d3c94e67756afc01c71f0f1ee7a114c7350f0063e5e28e57e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES52242212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a553865642c29b1ddde6d4a4e4f2ff1de3ea00b88e006228a2d4e251584722c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDHM1906535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcbd7d0e20d3c52b39178bdec800fdb111124cb5834eb6bad45792ac2e8132b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFG2435091.
Yossi Green: Zemiros Shabbos with Reb Berish Vishever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e5e7e2bee8921f404a22ddc3a48d1c715d43fede518dca3fb9391093b28dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLS2229235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579d419b09bc027f96faf955cb27fe989334d17d4d4936012769fa22bdfebcde. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJ3V1401366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a380db41087957eec696bdcbf085efc6fbdfdf469ccdfac5022f512d5ec16a0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTBA2341713.
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 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 0x880e81d5fe69c175f54e9d103c328ba8cf0f59b0b27b96434e7db31556120b51. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US4NA1500512.