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 0x48af32bd03112324330755fa4cee158196e1e73742a27df34a24263c2352e810. 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/0e1b8904-1627-4724-a7dc-fdd0e5b0f3c5.json and https://artists.proofprofile.net/proofs/artist/0e1b8904-1627-4724-a7dc-fdd0e5b0f3c5.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 0xaac6764a86dd61f1f1f6ab567185db93720b69ea3e177c35d7b74e50ac3e5cd0. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/KRA341692654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b13ac5d0ce6b504fb92cadf65103bd0a4d3ec515f74e3377dc6b20c348c6d94. 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/KRA341692656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16103747206541d13aa81d73b81db637be7bb8903d1fc8868055335ae9b20c98. 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/KRA382323004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217189c2c936d642c0ae22b1cd94449665a651fd2f67c2e9db521173ffdaf526. 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/KRA382323005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e571fdeb5d0a68dc34e7d74940fefb1f06f57a8006266665b1e4d8a9e32c8c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZF452023861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140dd267ae37f4a24a7046da6e243ca5fc946ed3fea4de68bcd1eca87fdd9800. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZF452023876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42511fea5ac89dab420a321ab46d027c3ac75b77a44810bc2d02bfb2728c301. 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/KRA341756987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc332882d55160861294dd66120d294b7a1df10635e511eac11eeec872941c8a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/KRZ291600524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b509ea096a45568d72a8982a58f7393f6f95c4dc2fa6b07e3a5a435387fa738. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZF452009591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d61588a93193ecfc949660b0528b7b37f20d838b30ef9726325d6dd8888e1a9. 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/KRA381002332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cad9c82e8fb9986c4924d998b009861a1ca67ea34583f1ac63feb0f60207f69. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/KRA381002346.
Jang Ok-Jung, Pt. 1 (Original Television Soundtrack)
감격시대 : 투신의 탄생 Part.1 (Music from the Original TV Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec53710d6ee2090519e2d615187322a49f4d9aad3ede72b7bc8a3131cd360d. 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/QZF452061062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8b5b55cf031b98152c11fe2e8b7a679337b9e6b15c84f26ecbfb2ee66e72eb. 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/KSA012106898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0fc1e328837d7512f157e29222e438dde84b155ecf785e9a4d3324d55bb0bd. 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/KSA012163097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569bbb703e945ca4bc6abaef020d1479d5229feab32a8ea7c6a888fc557a477. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/KSA012184042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c6bea76361d376cfab6ecef22939afd1b60a570d9599e130a4dd4ca50d7f43. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/KSA012193634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0f754fdbc8416ed40711409de7cfca0ea9b6433219e8a797b3a21fd865049b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/KSA012193640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccf9601c3c1751ed70b34298be2dae1f7fd1df976a8d4fe95ef36a2ffd65b0e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/KSA012193641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e218f8a18c97cba2a2dd0e27bacbd0d5bcafa5a2df9f5fd46bcfb93969bcbae. 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/KSA012193643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ceaadb5344710402352ba65ad0982b9a4e8c275bbf2f78d352d842b2dfc83f. 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/KRA341558630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd628324ac5d4c6be2cc66847ba37cb4dd3f88373bd5b62b3da5eddcd0b09fa. 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/KRA341558631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f18558f0de989fd88e952cdbab1dc2205f2c82f79cce5fe7af383528bc1697. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRA341558632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0d1d2daccf42b52905d20b9d18266ec8d36124a66dd60002efd07899321a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA341558633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e02ea55c98888de9aeb84b8bea6b24898551c73956afbd6a30359aa382c41. 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/KRA341558634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bae4d82726b248d8bd6213d562a6708e2e002e03f6e53ccd1185c004cb41925. 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/KRA341558635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80e46da5d57b682fdf69318bda7b4095b8c72a069e8bba7214480e7285ef82. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRA341558637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bb6c86f885810449eaf4a182536cfee780614d2e284042c058d090ab388d12. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/KRA341558638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc1e81447d804c910dc13694bb67e29bbab8753605dfd859a1a646c56cb2b28. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/KRA341558639.