Hankook Tire & Technology Co., Ltd. (), also known simply as Hankook ( , ), is a South Korean tire company based in Seoul. It is the seventh-largest tire company in the world. It is a part of Hankook
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 0x2ff8ce0a05ac22732ae28d5c92a9af0f5a062b607ead04569e5088e0f3e72b00. 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/5da36fce-8126-4ca9-a6ec-2463591cec30.json and https://artists.proofprofile.net/proofs/artist/5da36fce-8126-4ca9-a6ec-2463591cec30.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 0x879c471923db9fee016133c3f56b8a72df6d8be15ae5fa298051142bdf265b7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ1560739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042bd6f6f424b942db8e5041886301de9bcc627d92e432c0537cfdc380ff8bf. 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/USLZJ1559920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce8b68387720cdd60ae9b0f0c34cbb92b92c05fccd6699a4579a159a0fb7cb1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USLZJ1559919.
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 0x0e5bc1b9bbbb2f635fe0a0c409d83e0150b52a8eec02b745215822ec002e5eeb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USLZJ1559922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a58de91cad1b771b0ab39f6e09842e631000887801514602b9d61f66c9302. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USLZJ1559923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6d27c9f3be155d149541a405488053697d58c6551838ce546cfba6642783d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTV32416757.
Wabi Da Beyond (Hankook & Sergei Orange Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cb98789e9737f30404d8b6c3e3cafc9528bad5c082f756e10ea9011ca2d447. 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/GBRKQ2428377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfa1a074f8eb15016626b476640f1ebc57e0630d43922b535525fb2b6a8b724. 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/GBKQU2403193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a166a07b58ad493717b92a837598399a4444330d3c026af09d28902430083cd. 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/QZZEB2378180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3622deb2a9db01101e5f4d683fb7fe4a34c594d8e3e2b6df1a24cc3bec9bb. 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/GBLV62301297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3077f82ec723da06e034983c48a54a2a62dff73641de8dbfbee65c22e1e2e80. 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/QZTRX2362887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d0bc4cd543cba1bb1a6e5c868ffc61d8c071a0ebd65110008c46d5d0de2e0. 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/GBKQU2368629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa151d7e396cd8cc467fd18bbe8236ddad0121ae725f5bd122ceaa39020d10911. 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/GBWUL2340064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89204bc0f219fa1f18de51766e6580ea4d5c50e07009c4c49207d35d1bd8dae2. 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/GBKQU2348947.
Karakuri (Hankook & Perfect Kombo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b57f724646b2a00c525ad1adae2ad2f7542412d62986623ebdff7c4add2de8. 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/QZ5FN2335173.
Breakin Bossa (Hankook & Perfect Kombo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e077dc7e1b2e3237f591e2a42bd306024de5cc20af4cace639c1a1646eda336. 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/QZ5FN2311180.
Alcatraz (Hankook & Perfect Kombo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc989acebc742ae71fb8b8267c41bbf015aa03df7d119e02f54430754dbdfe93. 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/QZWDD2292406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe086901869bdf8a2b9f144c16e839d641386fb008796696da5bae383a757d7a3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWDD2253333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027135616dbca280a9de6e67be4ecab3d62db313dd02c68369edffd216d1ea0. 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/QZZEB2405074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12c5073f9856730cf3f6501493ff210a0e1e50ef0c821b511ec787bdb148b2. 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/GBLV62400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ef0c876c53752d0025111f3976ae143b88cbbf96327ae940a89b317d3ebb8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ8A2450421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee29d61f052404f13be0b57c5a8b4f79766c0d3e0690ec4412596bb54a811b7. 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/QZZ8A2473682.
Wabi Da Beyond - Hankook & Sergei Orange Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca9673f91d615d7fecbbd19b31c82a6bf5924637fa393a72a2f6dc07eb1d7d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBWUL2489529.