Golubenko (Russian) or Holubenko (Ukrainian, ) may refer to: Valentina Golubenko (born 1990), Russian-born chess player (1923–2001), Soviet war hero Davyd Holubenko (born 2005) known professional
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 0xb426d3dc834e81b00d4a3168b0150b9bd2d6470f650d11870e4df7e76d3b5085. 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/34428775-cd48-427e-9546-2fdd17678220.json and https://artists.proofprofile.net/proofs/artist/34428775-cd48-427e-9546-2fdd17678220.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 0xca3b0c590caaf2afa8c2d3f0b1aacc91b19e3c82a36ce5a44b935bb40700fe1b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PL2DY2300977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e023723aa0df9d60a3b6213a1417550da5ddb1b14de5b4af18e6d52e5e6f4b0. 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/PL2DY2300978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a144a9689ce0b8881d42541e1185b0fc7a58d8fecaf6dd96c63f45656fe4d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2301597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc67803f0f9dd8b7b48f460104f2ba6e563e1a03f38a29e731b3478f592d243. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/PL2DY2301699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ddd999eaacee4266112a128015975243b300783cead9396743c9c32d86c40. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PL2DY2302113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dd6bc03da5880e63dd57c59aaf2bed92482db422e27151bb42fc165887eeb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PL2DY2302257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f969c23e273b921302afd74e055815d8e8dc8396994d0578ab2850295f677e0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UAEO12400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a02ba673b0dfd0bfd8c35d77c6402162ff6d438e68f46a44913c843f76b86df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UAEO12400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd367dfa435b441ba326abac4e5523c37e27ad5633f67b0a9caa6e1338d1d7c5a. 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/UAEO12400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb7fc34c3d6808511b9fdf28d63a00e2674a52ca9c9670f1304d40c9b33e97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UAEO12400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647604480f7f74b48d2beb426e3a17b23c6d6e0205bb1e7da67006f8803dc5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UAEO12400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be02370ae1b4626263d1125ad4d905a5acea7ce8f6f55a2afd7a02318b472c2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/UAEO12500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab8d48205cffd0cdf6aed5490d7a060260ba4362f148757bc611d9bb9621f7. 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/DGA052349877.