Yosef Karduner (; born 1969) is an Israeli Hasidic singer, songwriter, and composer. His biggest hit, Shir LaMaalot (Psalm 121), appeared on his debut album, Road Marks (2000). Biography Born Gilad K
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 0x12761bf5ca17715983df7a52da30b983fa409ce7eb7bfe1123b53a7f4fb85339. 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/27f539c1-38fe-4ff2-97f3-27729d2f2960.json and https://artists.proofprofile.net/proofs/artist/27f539c1-38fe-4ff2-97f3-27729d2f2960.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 0xe50b344c98b19317c5bc6e27b55b3571b490b2bb2960121a207faf7ed88efcbd. 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/IL1012201547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7322c490686311483f61c0aaccc82103ca69985952fe10ebe06fdc8965f78c58. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1905553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aec1edfe7b8cca886c892158d2eafeb5c750f76fa2ad8d61b32d036b40feef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDHM1905556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a519f2614d515ef4be86aeb888372f599d59b31933806e94f9e4d4d7da1e049. 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/TCADG1788176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8695dc7c7f34d704ff762ee14bf8f9093810ca3cc912969cc88fa59592ef24a0. 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/QZK6L2278645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c51c39d6f6f8648e65861081d8dd1de8387456d3020c555e94cf982a66ed2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2015656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378c308b3e39a718291b495413bad22bd71532b23d4bbde95e7632e89574cf4. 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/IL5842238200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ddba71f3c2a485514863375c6462be1d66bc5b7a66eee1cd3ad557491a726. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IL5842238201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d0b194e0ea253d355ea586d1f8cf912ccffbbe90e5030f3ac4a2c4e0c4ba5e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IL5842236002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8b78a3777a0bccfa7d56d8d1f669f3a85fe61cfc58096566b5ef51d0095dbc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/IL5842238202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3432679176bb3157fea073adddbaaca6b4000eb4552dfc88fbf431a6bfb7c9. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/IL5842236595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f015061a25bfd753da9ae0561815a2f649767a545bd98a3d9a8b83310ed06. 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/IL5842238203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5057104b3851490ca91a60bf99ae2051314d38b4bff1aff78101092a4824b864. 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/IL5842238204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175dca4291e9c6acbd834dfb7ea71ae87c41a8e44523e63284610c463c15393e. 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/IL5842238205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953413de73596a7554cdc10c9fa9849859dc5d8bdfa31eb70bac92e2ab2442d9. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/IL5842238206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a16d69e67a2002f9f9b0b6bb9a903333d3bd6c480eb0d09906ad5111d9639. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/IL5842238207.