Hidden Face () is a 2024 South Korean erotic mystery thriller film directed by Kim Dae-woo, starring Song Seung-heon, Cho Yeo-jeong, and Park Ji-hyun.https://en.yna.co.kr/view/AEN20241114005600315 It
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 0xcdb70be2541380fbe69ffc2ecfcde7da652b45c9e7fbb06ce2af18c84815ca83. 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/eae47e70-6bf3-4d21-b154-5fb5d6feb126.json and https://artists.proofprofile.net/proofs/artist/eae47e70-6bf3-4d21-b154-5fb5d6feb126.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 0xbbce89d3a0f270e16a9d4a98cd76b761dd2fab1d26fe172d67d00447f7731326. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:38Z), 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/CH6541859742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f814add2f96960ede1ce5d2755b421c0a00ca5a20a6108cddf3f5adceb664e8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CH6541871531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc9ebc4834a93c1e82bbdf753ae64325d478c35c5bf212e13f3efa8553ba256. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CA5KR1909515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a55d1e84df2d0fa8cceefe31cd4c7b84e68a09934511aebab4086f9f2bbae1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLQ21980136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d0308b238735f1959d7fd22efda48468a829157f7929754996be72d4f5289. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:26:16Z), 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/CA5KR1955999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c387751485681b8a4ec03c72764d52aa214f50f9e7b5cd74c700ae5018afa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLF712001055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ed7bff3803cf93737b8180c78dbe48346a238398f72082e7e8a6761953a4e. 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/GBKPL2096207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6263585a9708bdbc4706a695c4269cfd0d40a4ea72600797d2efbf8a8421a3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBKPL2001446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d19b23a9a72fe4ef564da52e20de728024cbdc3c5498d31f23e803c93f6ff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLQ22080213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849d8aa637edb32b9a7dfc7f5566bf6461f3c19c5a3e618ca76d96f8dea33d60. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CA5KR2088901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686722168499ede8d227a75c1c41993c1b6eda5a032b5dfc483957425f342458. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BEHP42000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be922718bb46e89b4c0b17002c4f6f6876fa78f46a6cb0f3fb763687ebdcd34. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USLQ22180284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7b21de642ed461b0e4a7524ccbfe4f1de12afbec828f583d3b44f3ae9257c9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBEWA2103070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6411d0ea6fa323ed488ca15f36b804ead8c207d743870f93435da4b7290f12d6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:45Z), 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/GBEWA2103072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c526f42acebfdd295d49a3195dd18a3711fa0b63656ff77d5eda397695403dd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USLQ22180398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4dc1e854b0ffcbf4c7589e4f48151ef9a3a5314bd8b50d2fa559b7c260b198. 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/GBEWA2203580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a2fa9b618b5f2627f17ee1a97b907231aba436dc876be752584bd820740f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBEWA2204020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1ab26cf9c15bc0c74c1e830992eae38219eb6a849cd97693410c2df4693dc6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2272947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c07a72621dbe1061f30ab930b765889dda5b7d206cc454ddc1d94a594f04d4b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CA5KR2309067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3fb480ed79fc675181341fd44b4b82fd2c49ccd0b7bef2f8c063689bf62992. 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/USLQ22180520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37257ec9542d04f4c70b4d506dd04f30185d7190c26459666aaff03458f514dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBEWA2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066259177eb9a37a0fc651d838b7152475a93e4b28b6ed735365b7be84fe314. 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/USLQ22180659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7848914561709fe28ceeb9c8657cde53ad260dde7bfe48d0a8c06e1ded6f3. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:26Z), 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/USLQ22180679.