Lev Tahor () is an ultra-Orthodox Jewish sect often characterized as a cult founded in Israel by Shlomo Helbrans in 1988. It consists of about 200–300 members. According to many, it engages in child
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 0xcbf52f2a505f8f53baa887c7dadc114aec17a815d7d9b7a5492d74d229cb120a. 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/8b2a7ba3-5454-45da-95ae-e4e1d73a0553.json and https://artists.proofprofile.net/proofs/artist/8b2a7ba3-5454-45da-95ae-e4e1d73a0553.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 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 0xe00349a80dad6894f3e5877386700a6301e4f0e706203391908ddf117a379eb4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABF1276674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a8aa1bd3086ee567195ca61f676bd97bf43fa80c135dbf6394265b4d389de. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCABF1276686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbdc79b10efa4181844b6623402462beebc7fe8bb19b6f3078c3dff5d0b3610. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCABF1276696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5297e47afa96d40f106766a48926edcd8765a5bc37df63983266320eef9c8bb4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCABF1276700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827fb49567fc428c2229d34cc5ee51ce6b4f14aa9b970ff943f80cf00fc2662. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABF1276720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892e31b918ca5bcac913291252dc69b0c124a789eb67e7356d84284142715b07. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABF1276739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09df7e229640709be1d6fe477d2d284c5a634260714c28b19183f3ad89f589. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCABF1276746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb619fcec79bc49c80b95fc3c3b6b7423ab3134bf9d3872e076f2b6223450e7b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCABF1276755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2f223c199f6e037a82c211cfb83b074b42ee79f07c76492c2e73bf7f44cb18. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAAT1017278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e28f991b6e98f7343d083e73108a0e27f8c8c24401cfc488e0c1df46cdb9c3c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAAT1017283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a8e1e07d5a15eb249f2924cb8d673dfe2058499c7e7c0e877124a3db97b45e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCACY1706695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beb28574aa448b6c620064f3135c44a0652a1a36244d8721521dc9c19131b33. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACY1706718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceb259d40ed3eb1bc48556157c4889825f1528a3d391959f91e4a945f66041c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCACY1706927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ffd9ab48b247527e7b9bd636dc4057479f7f0dfcd06c7a969040be91fc534. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCACY1706936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc522bbe848e4a45b34c9b246a75d1f7ea5c25709608cac452ad94e72eb36c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADO1848846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1a201e82da087fc0014a70cbb6f6bed081745d223a93d22768cb92ddaf0405. 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/QZES52242202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c50dfcc4dc220ac0b982fb3bd6be191ddfa084bd7ee824eed5c023fae5984a8. 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/QZTB52427622.