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 0x73d2ce77723d023b5fac88670868c8e6133010bd968b3459ab8eb34308d20458. 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/a2581f32-a47c-4696-bea0-ec75f58edc8f.json and https://artists.proofprofile.net/proofs/artist/a2581f32-a47c-4696-bea0-ec75f58edc8f.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 0x4575980a550fc759c1eec427d621e4e7d2926b162fc533c612c67415599898ef. 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/KRA381903004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebbbd36fd47d9124721bd67912cceb943bfe0155c3d0199460431e80ec8de96. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/KRA381904090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bd1cd4e96175358c4c546d48aeaa8b6e19fb8515fabc85aec112f76e14281b. 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/KRA382000962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf645c32971aab422ea4eccba3ee5fa0e7d7e3f0c2a84986bf8bdac72c029b1ab. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/KRA382003221.
INTO THE RING (Original Television Soundtrack) Pt. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff4eec165c0b30484b369c56a0a2c133f56f8cc3efc3a8990d93a40ed20451d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/KRF262000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88d7bee26e8993c62799d15d68a915589af207951a917b3a1ea8528edd2e767. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/KRA382006151.
도도솔솔라라솔 (Original Television Soundtrack) Pt. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cbcdf60d8892c38669c10dc62f60768e923c7e50df6c577e5342a4d5f12246. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/KRMIM2136280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066b379d59a962bfa6fbf1278ecb8f718722424ae667d3e4ef0b6e911e9165b. 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/KRA922100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6098dceb4842f056c15aea08f912ab40df01128b966ccfa08a24e41b5e8bdf93. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/KRA492200465.
Once Upon a Small Town (Original Television Soundtrack), Pt.3
Behind Every Star (Original Television Soundtrack), Pt.5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a17a69b34e11c7a95426bf3e6963c077ea1b81e850a94c2b2f7ff73498cb45. 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/KRNAR2233008.
Joseon Attorney (Original Television Soundtrack, Pt. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1db99ae95688c3c47e787c539653023cfeb2048c9f5053d0b85308c1620aa1. 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/KRA252300800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53014e1f52f1edfee6c19732bd2c30fad417d2a5ef7c31e26905040fc55671d5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRA382317519.
Destined with You (Original Television Soundtrack), Pt.8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4b9c34ec054b1dc25bfc355487c1404d97be1049b39ff1d5dc345b04478f1e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/KRA922300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d80ea643f42659b086b3b4f1568c8467427ccbd41fd2ecd39d5c3dc570c0c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/KRA922400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce409df70cf8a37d8d9114dec2dd68326e1aa41f66416e5cf085c55991acd545. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/KRA922400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a43757dfad9d841eda0c1ce0f36d1ad820de5ab413d198a18441505e0d9acd4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/KRA922400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5e3b5fbabde152d4324927e6f11ab9871f6d1579fd9ce07d5ff1a093914e9e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/KRA922500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc9f4df6d8b11f52d1d9a8209f6eaf1e73f2dd68c4a4b7649a9fd463d3a0b78. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/KRA922500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6a4a177f865d722f56f485bc31dc80dafbc27c76fde9962709324f197ab7a6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/KRA922500004.
TO THE SEA (Original Soundtrack from Just For Meeting You)