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 0x0d370deb8c1d4aba159d3a24bdd74aa605f266998cc5d981ab2537c3ef52cfaf. 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/5b227031-85b2-4efd-a171-8f83ae339d04.json and https://artists.proofprofile.net/proofs/artist/5b227031-85b2-4efd-a171-8f83ae339d04.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 0xdf532b158b9905e6a905efda72a2ebe6c7fd6fb4f769048f7b88be6ef8ddf0fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRA380900984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd41ab212c220e29992f537991fd22a09bd98bc0b2fe29b19116e98456d0090e. 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/KRA380900993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f01154d093a6a6e64390654dff451e48fe872c624718af130d0b6d61380f84. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRA380900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4931a3a45ecce81e6e14310678d3e1a60136d9a82c6a53660f7301f88061afc1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:43Z), 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/KRA380901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a88a146c874d73e84988622a3ef597c36691f083955b7c502b3766bdb674d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRA380901054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d14337ae69108d6f4180f31f21971227b8b1a69e4653c05ea8747ea11ba8e1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:05Z), 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/KRA380901048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747264366b88d8377080ead7cc9a1d9f474fd107fddafd9554cbd2da3a569079. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:47Z), 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/KRA380901073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f01154d093a6a6e64390654dff451e48fe872c624718af130d0b6d61380f84. 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/KRA380900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68257bd3f4f24d69ea8efe3b2e12d409db71381a03d47eefa8769bbcdf0e482e. 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/KRA380901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0c4c204f82e13cab5bef8de9a347d4bfb63d9bcb23ad7e298ade453bfac20. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA380901078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68257bd3f4f24d69ea8efe3b2e12d409db71381a03d47eefa8769bbcdf0e482e. 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/KRA380901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484461a7ba447924f7f59276dc6af30d94166d72eb8b9c872c7b9970ca82c731. 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/KRA380901092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4af2bf1795aa2b52bb42849ad7b6486fc0a38461c0f60cd932d49a2e21edc6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:36:38Z), 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/KRA380901132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3f76d6e6ea80d393afa6a4fcf7542d018f7d073c78d442ad030ebe7a269a0e. 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/USJ3V1152789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45ce7bc8a8a0d17509a5dc71f9ed92169911d15e5e93c1470078375d189e85. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:58Z), 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/KSA012155020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6113c188537ffa05b49e03273ebdf6eea6e7f80607c3c3214bacc821a8707bb9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:03Z), 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/KRA340900199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52550af23bef08dda4a8f3f460b5feab7c7d8b58145683ed658486603dba7524. 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/KRA341332243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3148e89c4b7ca3336aac08f7cf489f3fe172cc3d6eb1cd421812f75e2b829d0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:24Z), 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/USA371054558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105b681ec10f4e6c6733fb3ec08503e05feb2ba1f4d08666f1f413a61f892c3d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZEKE1808163.
Jang Ok-Jung, Pt. 6 (Original Television Soundtrack)
White Heart Baekgu (Original Soundtrack)
하나뿐인 내편 (Original Television Soundtrack), Pt. 26
Kkondae Intern (Original Television Soundtrack), Pt. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae8cd360a97325c7fae1d272b3b41187d907fae4de696e94097f82b4a19a969. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/KRA382205082.
Never give up, Pt. 9 (Original Soundtrack)