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 0x396034c62d21aef522ad47b0fbdbbf78c85133535763e4229b9177af39dd0fb4. 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/9907fa5e-54f5-4b5a-945e-7d8aa5c1477d.json and https://artists.proofprofile.net/proofs/artist/9907fa5e-54f5-4b5a-945e-7d8aa5c1477d.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 0xa04e2e1db8e17ed42c47ba9343be65159673e9d9fc2d99ea0969d64adaf64f32. 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/KRMIM2100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380b00280a42a2eaff9855cfe4528c293a8f581976e5b274dc346d2c844c454. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/KRMIM2119368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacd211133ad29dc55068825bfeae43a11d6cccaaa275b869e81efd221e7bd6e. 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/KRMIM2119369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e288f40db633763c82e549ba8db6fa1dd852b0aeebaa6de7f8634a6be3c39c3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/KRMIM2119372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6862e4628946b430cd85956d7d66b4e179d9fa895c6d9989a2f63c7177a2a06d. 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/KRMIM2119373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652923ba98d5e89dfc272e639e9f0cfc381562495a069c1919b22607e9064ca6. 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/KRMIM2119374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9bfc1cac9b1503bc48ba1a0f750790f1248698ccc9531cb75816ba0df49f62. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/KRMIM2132889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1ed57745a4ca7e523c6e65e9a2276025f8c96e1acd63ff90ec5efd75f86c0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/KRMIM2132890.
The Empire (Original Television Soundtrack), Pt. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3491133a82934ab876bce695b31e8e60f9b25803738a236981afd918e2c7b97e. 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/KRF702200522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657ec384ec9f6ca6046bc5756cfc52b2819c778cd83662dd04fee8c450e4843c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/KRMIM2302936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b74778cac1f7718ddaccefeba1d13f9dc40bab85b304cff3142be619ade52c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRMIM2302942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b9558bcf261bf2a038aa842f8eba7a869bbea0fe743488513d9454715842ff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/KRMIM2302944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc69e88f005403da8ae5c12a8e8b8437aa7470dd61e94680adc1c7f5b84c616. 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/KRNAR2335487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc8aa73dc5bcbfd1d94364414d0103de966cfdf74d0f426ca5a56ca374c82e. 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/KRNAR2335488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5225ee5290697c7515bc72b8646e2e0a9cc406188e9e3ef68b00f0b4100c92. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/KRNAR2335489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8986ef69493e14c81f242c7ed01c2c0a6ab5e9216ed721ef8b839439a1629b4c. 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/KRNAR2335490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8c11cdb92e09bdf2aac78a63cb7d55dfd89e39858e01c2b0dbf5e36fd7de0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KRNAR2335491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664075f7fe4eb7507d1cb8d83de4e1fab34aabb746bde258b175187f5f9af374. 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/KRNAR2335492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45130474ea6e63ef45f08a2b89bdc9b62c5a5ff5775f39a7028d9aeb315c46. 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/KRMIM2465816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f24a0b6a58c9be3fae949d4815181864dc2b0539000eee6d573b7f18960412. 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/KRMIM2465815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc771bc73461a5389ab2fc1879333dd0bfc1c84239d6691d35c0fdadee49e3bac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/KRMIM2465817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf584eca87ceb112cd727989837831b33e43ef572cf7925a01730676b83235. 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/KRMIM2465818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ae455ef3369eb96550cab253312b0eeae05bc19606c091bdf739dfd22c122. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/KRMIM2465819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef79d3fb02396955d726d663266d5b8e2a7b5911e1fa07fffbd47bbdbeccda. 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/KRMIM2465820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ce1dbd1c8649116a2710c806bed6b8968a628937d6088e0fe0323f90331ff. 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/KRMIM2465823.