Bondarev (masculine, ) or Bondareva (feminine, ) is a Russian surname, derived from the word "бондарь" (cooper). Notable people with the surname include: Timofei Bondarev (1820 – 1898), Russian philo
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 0x6a19cb6cccbedc3b41fd657b331eed1407ce2b7e53bf6dc033ababe2fd2ed983. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa8f76c0-8975-43fd-b522-28a193f4999d.json and https://artists.proofprofile.net/proofs/artist/aa8f76c0-8975-43fd-b522-28a193f4999d.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 0xf2b22ca42710fbd8f6704d254aa1c904a8e155e201991a8321fead611b1a0938. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/US83Z2013270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c150eee83ad8ffdf01180baab1ffb24902d18e6d2229748bf6ea3cb8a0e092. 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/US83Z2143657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4501c3f19a1f27f10770523d14c4f1649dba8e09e5c0e454123e7edb738f4aa1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2143656.
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 0xe1a52336c07f83f9ff79d56147ccc47194cd13f566168daecdfecbe42b42a15c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/US83Z2149285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358fa0c6dc0ed38857d292e046657558d37b837024e167f4f2c2275a49d48213. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US83Z2202844.
WARPP (Inc. DJ Ruby, Greenage, Not Demure Remixes)
Meteora (Cosmonaut, Digital Mess, Jiminy Hop Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d66bbce8df393a3fe1ba927442da72047523b82c4afbf2142542b359e438ec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US83Z2457667.
Metamorph (Incl.remixes by Anton Make, Redspace)
Samadhi / Multiverse (DJ Ruby, Hobin Rude, Ilias Katelanos & Plecta, Redspace, Roger Martinez)
Remote Control (Incl. Remixes by HAFT, Jiminy Hop, Ilias Katelanos & Plecta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9058645a054575282d3785e78fd55b9b96cc56cb8e38205ac6afce56fe4d4bc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US83Z2506708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54447c3059714f5a1a9b8bf49042aea0bfe6548c2f8c4083e54eb22dde4e0c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US83Z2503396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4497847516bd3d7cac7d088c0688d74510af5a46bb6d8ed46aab92b774d5141. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US83Z2519136.
Proxymates (Ilias Katelanos, Plecta, Supacooks Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99df43457619cdcd7fb7210cb25ed6a9ca2072f92c85826567c3d43107789f9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2530794.