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 0xba82c5b772fe4d1a0279b1ddd950dfe75fe239fe703b8dd2de17748f0ab89f80. 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/b6ab12c5-7947-41e1-8001-7f88d97bfd92.json and https://artists.proofprofile.net/proofs/artist/b6ab12c5-7947-41e1-8001-7f88d97bfd92.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 0xa39be8f0a12974bd2faca78bbaa5c9113d0b24ae3f203af88db776c6463f6fc4. 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/KRA340926390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10b5e838045a931d3c28d2f5e490ced0c35b1b3660ec48f76c408b1dd3fa35. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/KRA341334209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd43bf1c0b148cead6f88d92646d31b9b47cdb005978aa88797f238438e29cb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/KRA341334211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647524d16638b79dab4594cea2a4e7c88644d6220767e928265c075669a04f3f. 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/KRA341334216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca72e62e57abedded60a3f8aad159a8a3e7c133f14e1ac026b142ed281e88fe3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/KRA341556655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eeeaf139a822c454bcdd1a51b574c3ede23395158a47fe795d62cd39fda409. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/KRA341700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d748047a4918525b5bdde01d4be7899241a5ffdad46ed08bfd99c7957ffdf9. 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/KRA341786822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989ee5619b3f89153dc1d03fbdba18b824d4a1f414a049cb53e3ab419e97197a. 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/KRA341786823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0259e5ce78b8ce53193e11c87a91454eba15bbf5d1aa13b065931a535fca09. 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/KRA341786824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ab84b0a60da1f494244ae4488935839a94e6009a65937f3c0c555b297c30aa. 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/KRZ291837130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518cb84799f2c30c2163cc54eb6dcae99dd86ea5f6ae2a8f1c6b26057a0b95c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRZ291837131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19345a6cf4941cb83d39cd66d40f04e67f20aab23d5b9e4fe30578c33026c4b0. 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/KRZ291837132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d6a58442e70a3e8e2609eda58ef5e9539fbaaabeb56bf583867fc7993c41df. 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/KRZ291837133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a66af925d561848cd32673021030e3b5910c6fc6c1e3c88b83ed83c19d976f. 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/KRZ291837134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ea3b682f89e8f810cdce02a4a074d3b4a3a155519192ea572bd8023a273f1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/KRZ291837135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416934b5a88929c8ed66df7235aa24deff25f8c85ff832cbbaee5aa9b9be0097. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/KRZ291837136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf67f1e221b95647a76608a7aaec7c6e13701410e51c851393a50ec2ee69b81. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/KRZ291837137.
주님은 모든 것 아시네 (feat. 강지은, 김동욱, 민나래, 이명로, 조서연, 조성범)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2f188842d6dc4f1e9370f3b81dedc4882d97277a767b16c8849a6911bd2cd. 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/KRZ291919307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1ed5312850fd9357e1813fdde51cdb879fb7e83a5b2ce6b643ad6e92744754. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/KRZ291919308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf452a380ded3486c85ab09b817dcd748b9178e70a9674cb1bf050d1c4238be. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/KRZ291919309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7c92f2b94c15fe42eba199a173cddc07f05fa948452aac30329f9d954e56ed. 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/KRMIM2032149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4746e016ecfdf9cfc9178bed60529824267d99fef92c399dee4a9c0325ab4a39. 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/KRMIM2126509.
사랑의 통로 (Feat. 강지은, 김동욱, 안혜진, 이준영, 조서연, 조성범)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd893fdb20ce733de23f15f5df19d853b874f7b524eff90f8f4960f4a62b94924. 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/KRMM02325840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402266eeb891881a133c1fee2318f05c9328110754d2aa78dab712d48472c46. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/KRMM02325841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feca362aea7a902fa2b18dcbe7016704d92f9e22549ff05cb9186a2020da6b2. 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/KRMM02325842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13684ac82b7ca5f0ab0ffa016a4da182be1eeb53a5276c20d2d6ea50a5a2d33. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/KRMM02325846.
유일한 길 예수 (Feat. 강지은, 김동욱, 안혜진, 이준영, 조서연, 조성범)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa504b5822257dd3840ebde7aa9b533866d0fe776ec154421edb81857137f170d. 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/KRMM02325847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ccd225c17604c90e811d14b6e6d3f7be968b952d71e910bf705b986bb9edd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/KRMIM2473950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f75d7d8007862e8164fbec68a6c7b10e060dc65708a2859a0ec638dd41ce7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRMIM2541598.