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 0x9d284eef05dca4ced5fb6c3b362d94e70595ba0a2b31d8e1f42cf5cf151dad80. 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/a6df1770-5ecd-4027-98c1-828d8591da26.json and https://artists.proofprofile.net/proofs/artist/a6df1770-5ecd-4027-98c1-828d8591da26.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 0x18b2519e9a3e9362d33a64b246b75d2bd8cd489da2ade4cd33d9e4b0ae360ccb. 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/KRA382205053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c89c87352ce3a287473ddf6460da245218cfe7b965af7480227deae586d7d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA382205054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288b0340497af1f696e5f62e223606e45cb286e71cd52b6c33a08f712ccc2958. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA252401656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb92a16d4b59c44dc2c84e0a0314a555b09ac68a4f758b87cfd7cb6141690d19. 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/KRA252400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b88e2a1f113d062b58e9d73e72cea38b57125fe53e70f7eefbce96a60ca051. 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/KRA252400524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5907034d21a708684fac871b06429304713f45519263b37d4021a1bb72d282a. 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/KRB462301071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd602afb14b3cc92b21f6232c9ee8878fd45e675bf18a5747a86e90ef785300f. 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/KRRAR2317340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ec5767595a72142fe3b6f21280e695e95aece7f3a44ff1464f9ea3e61773e9. 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/KRB462300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5faf40cba078ab009f464fcd94be7c96f46bb943e5d8ea10d4191ce3c58c2. 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/KRMIM2352156.
All That We Loved (Original Television Soundtrack, Pt. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa932b4eed958ac3f97e6e1dac760daf45bc62085dbff308111f916b4902c5e. 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/KRA252300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5225440077e85cb0ed51ec387cf582e7c4159aa6d55361955a2afe8b416b9dae. 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/KRA252300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4511e84a42e44c2e41dd26e5d9c9e13aaeed97ec0631a0db84645205080c3f1. 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/KRB462201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb355d843fbdd96813dfe6242f093d2f02f40fd4d59771d535eac3555a0aae25a. 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/KRB462201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b5e8a882254d1257ce1cd34d37ed7006f5696f1909a735155a7ef83463931f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRB462201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2e019f6f2ac84b59a1571d0b47ead328ac256d1a3caa0cec1dffe4036644b. 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/KRB462201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b19cb7881195a2abfe7a31f0b7aa82bd045bf3139304a157dc568e5c3356d7. 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/KRB462201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed294dd1e2d52b48f26712f8f86708630ebe45a6075433f81e0594d78f2fd0b1. 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/KRA382163759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed1022445df7312f7de9dc1a20f727c2a0e6a633eb2d535cd532652bcd26bb2. 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/KRA382159400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cc1d87c45f7c944d7c61164496c3e32a29bf4b96f17d01ec7e508d8fba96cd. 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/KRA382159401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c2277fdbd1661efefc5bc366bb9946e863eab454fb9fb06711bfee68e01072. 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/KRA382101576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7300aa97b8ecbb400268e3df1caaa9fe4a529f848c5b24a210660579c765a2. 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/KRD442000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666208be8ea7c507d8bcde45b886289a4a4482ac3d1ff1438f92447946cc505e. 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/KRA301900595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce58388c9be2583eb3cea78f63eb43f0132613742e6519c074d595fcc4f59e35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA301900255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1ab5ec1db48e79625d5f4f2ca5cea955d8ecdad3159c38bd67679ccf649796. 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/KRA301900256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c138f6ece36524e212b4c09f6077d94f415d7d7babbb2dbfe1158ed7a6312a8. 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/KRA301900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc0903cb8ba462cd191c05baf05ecc821f9f37ebdefb5e05127ca7808a239f6. 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/KRA252402047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb21e4bc137fe6224b924c9af3429db4d9a0bf90b3ad30fb6607b002782ffc2. 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/KRA252402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9581d1b564efa4267669020893438a175702adaa0823431c581891815d4049b. 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/KRA252402049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd520ade9f4defcbf040d7ed0bcf951fdbfc71473a5ac1a69317bf119420b42. 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/KRA382005883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3389d392344d2d2bd945f3c06ac07df480cbd2f15bc3dcbe5e1edfe5151a42d2. 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/KRA382006255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d27a2bfd893fd39bfc769591c24665caad1832d3741d228b99dcfc9ed699c. 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/ZZA0P2404156.