Itzik Dadya (; born 18 December 1993) is an ultra-Orthodox Israeli musician and producer. Career Dadya enlisted in the Israel Defense Forces and participated in the 2014 Gaza War. In December 2024
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 0x1572adc5e5ed69c65b2ada8597c61fdd69d4e8ba840c6d157c3d17c0881e8836. 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/c5cb2dd8-a475-479c-828a-6f7fb5dc57c6.json and https://artists.proofprofile.net/proofs/artist/c5cb2dd8-a475-479c-828a-6f7fb5dc57c6.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 0x3734af3545a5074dc150ac60eed50a89193f6ae3d55a909956cb0b90a5ebf000. 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/QZK6G2317627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e217da63e48b2177679fbfda1f68db6641f1417ddca61ba2720ec2f256e61. 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/QZK6G2317628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd734f788b6e09e1eba74c044a0225a1a7c0aa04968c186cd1ca4ab2557cc50b6. 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/QZK6G2317630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc763781204baa7e34164198579e05e5efefc4aa0940fa580016b0cedbbd59eb. 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/QZK6G2317631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed886c6dfcab6ec007e57bd39649e19bfbe49a5b5c1d5023b617ece882a5d0. 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/QZK6G2317632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ecb57f745f2bc810d8c7f33f7fd7103cf45098116d1f44a34564f74307d72c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRX201656264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9203068b265eea56ea0d594701e224ccffad3e1826fc7fb9a0863c7dc3d32fec. 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/QZDA52108003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ae4834157e92d0990027645ccb020a813cca3bf72f89cbb4a82ba515a64f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN42073638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca2a75dee8a0148d372182f6d9186f73c4110c834c6c2a2464647d78aa4fcb8. 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/QZPLR2346088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beec7c344011698ef89f5764253bc48b1e1d8a7cd4261340fa6977a05733009. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM91397851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110870d100f59baa57e56c65fc27bc217ee4e42e216d63a90c0a71b16120462. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR10S1906615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3051e7ce96f73ab9d57de3661d0c048d24c8f95633016509521fbdddaf5e6e0. 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/FR10S1906622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf831f3a266da7416e7b64e3ecbf42d9222ca317a7e9642c3ba8fdfab5898e6eb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR10S1906625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b28bf85237b4a2d74031e93a950fe9c4c21391df7cb1a9bc8b74d81dbfa7c2. 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/FRX991595266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ac96e3e9720bcbc72a7ed6c9a946269654e4af85fb6eee49caef26ccaa962. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX991595278.