Rabbi Daniel L. Lehmann (born May 14, 1962) was the President of the Graduate Theological Union (GTU) in Berkeley, CA from August 1, 2018 until February 2020. Upon his appointment, Lehmann became the
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 0x0047a26f4c8967a9b48fbcb8ccb7826ca1555a1ea927ba9df1137d496d907505. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f99d094-c05f-43a4-88ce-6d0a950ddb52.json and https://artists.proofprofile.net/proofs/artist/2f99d094-c05f-43a4-88ce-6d0a950ddb52.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 0xd95b5b60b28e745c9122cb8f977c203c1eb50ce1afe7a6dc4de94c4a99e78b5a. 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/QZNWQ2217691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e912e13a49941a4b41beeba42e063cf62d36828a449366061e79b00409c263. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6J2169890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ee303acd91790eff8b40ade0e2508ff9e842a4a4d70aedf12cd5d015b1e6dd. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZFZ22202622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f2313f00f5fdfa41ef029388ebe79a7b96c21f34b7f9bc301fd2fcd5f79a9. 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/QZNWQ2066099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c487ef899337cd7b495c3f197197405aa2a78d72f8aca0e7a68f5602d396f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZHNA2190999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d27485f93ca04de569f995e183a2aed1c3ab0acc392231b0d3aeab671b156. 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/QZMEM2084406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e6c0ff4b6dd40175740d9c44eb9cbb3fcd96a1761489de28e9e161205cb534. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ22090174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c05ba27467644f45b5a532f4eee7ff6a4b04505f41729f884c9cbc6e4f147ea. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QZES82082586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904a0e13fa2a3b60a9640aad9956378494adc8e73ef8109d63f7f818d5d808b8. 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/TCADX1855380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa12757459204a09eb0e9c335949414a9122b5f7474ae99ffb2cdac90fa1c56f. 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/TCADX1855527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8723ca41f802e232f4b7e44a96bda3bb581ddc0adc2b7c2bdf7a19388e599. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCADX1855323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7494d55bf0d0fb2ec29cc939d876109171b751f2a5d7498802fda738e9ed2b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCADX1855326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e60ca4ee88a5764de4503373bbe6479328c0b8ffedc40b5d3a549512db05e. 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/QZTB22293630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c26fabea7aaef3bb606b868910c4a0d6df60c5540e5248b447054a1a6acf0c. 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/QZMEP2284920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c7bf19c8541eac76ca98fdeb8a639fbb330b33ea2ed8599ebd3f7a1c694b59. 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/QZK6G2226030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b25dd6914d4139ba1716ea7add316b87959a87a64b3b480fe81cc299299e9. 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/QZES92230050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba55f4bc693ad78f0bbaf50074de95a41e2825c400dbad9a15eb7837bde2c863. 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/QZNWY2189132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e912e13a49941a4b41beeba42e063cf62d36828a449366061e79b00409c263. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6J2169890.