Mordechai Werdyger (; born April 16, 1951) is an American Israeli Hasidic Jewish singer and songwriter who performs under the stage name Mordechai Ben David () or simply MBD. He has released over 46 a
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 0x7053602cfe458be3946caecd7c0430103e77f85245db94e79084e1e508bd560f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34404abd-92cb-428e-bc30-7ea0615af362.json and https://artists.proofprofile.net/proofs/artist/34404abd-92cb-428e-bc30-7ea0615af362.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 0x4237e1f37f028b4c7205d9881989ca6e2cc972f79c4663c13edbc050b8ca4b07. 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/QZTBF2434751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe50bc083c5e8764bf6eeff6684fb9a835864cc446f851562e9b0742c7b2325. 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/QZTBF2434752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640493ca47881f9a450c8f2aeb9c1634ef78a29ffff185288c3c8d1c9c18b13d. 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/QZTBF2434753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fde090e42f46f7eb0559b424b56b95d4b38f8d563d1094a406398b9fd9e825. 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/QZTBF2434754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd21578dbab2dc519b63fa23b063e48d28040d5bc50ec96d091d1af64ce0cee. 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/QZTBF2434755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e25cd78857ea74acda6c4d7f52bfb089596e2f2534d36afbbe089880630ed. 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/QZTBF2434756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77612bce3bf7e8285e49e00c80fed039a171bbe3808f7ba6dfe4f26c741ee686. 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/QZTBF2434758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c66afd591837557eafc32f0e0c6942137502805e91d40fe16c17a04849dfc9. 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/QZTBF2434760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48dbf7e9f45f9d0436d7390df2a8f34c2e1fee1a7be504d82d8ffc150f263da. 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/QZTBF2434763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a693583dac023d1d21815444df4dcc1d23bc5165e4dce74a044e203a5e22ce. 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/QZTBF2434765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df2771a1564655249dc5a1b5061d33260e999c2a257ef6c0fb3f377873ebcc. 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/QZTBF2434766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a301ac7e2c45a3d16fe8267a4f014387a4ded0b5b47637bd9ebee2513419145. 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/QZTBF2434767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016e333955c41629598d5d2702c88eeb140131038d154891707cbb539d6350d5. 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/QZTBF2434768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63545fea281315a6d68c22f1d1ef8c484138aaaa5ef7d0420d226fa7ac89dc9. 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/QZTBF2434769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2176b8c5cab7314822ec3c0702fd66031ca619aabea937724e4e6b7ab41fe. 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/QZTBF2434770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e929db0722e7cf32b29b7f07a7c6fee9568e215f81a6c564f07ee7895a9bda. 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/QZTBF2434771.
Nerot Shel Tzion - נרות של ציון - Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee52ee081ac71896ffaff88450466a928ab72216c1c73164519d44d2cc56a6d. 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/QZTBF2434772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944083eaf29835af443dce0fd482a41874b17832926185dbf5f70cff8a2b6eb. 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/QZTBF2434773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3803c30fd8331a7a84d41bd1f3eb5ff756ae2db3fe5d561479ea2c982fba3. 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/QZTBF2434775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f859c006a77caad60c227096cfe11fa16d8782f2e67916c61124ae015455ca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTBF2434776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39732c00fefeafc1cbfe439ab70fb5bcdd84100536ef71b7b742b9886c1ff5fb. 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/QZTBF2434777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdf95d46f9d0e05c5e445ceaa296c05f8045bf838af98c540c86cc2083ad601. 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/QZTBF2434778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee983c333058935b931edaf748d25a24ceddbe3224558e5b1601ca6556f80d. 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/QZTBF2434779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764de13c00271c971b76505b211471ba150618e8d2d31849e2832e4282bbc5cc. 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/QZTBF2434780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d9b1195d37c0c013abefefa46a7adafa21a1df9e35dc5e52160865beefa6f7. 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/QZTBF2434781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be705d5ad8501642c75906418d20af355a3ddbc0a03d7a6cb3604e869aa218f. 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/QZMEM2130166.