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 0x1991947c749ddc8d975d25825d9bde09d78f6e91dbef02fda10a80db62198ba2. 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/01ee785d-914e-4a6c-96cc-3ca6469a03a7.json and https://artists.proofprofile.net/proofs/artist/01ee785d-914e-4a6c-96cc-3ca6469a03a7.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 0x029e528936013704292adec4989a6c16a857c7defbd702e25d082788632d2a56. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHNB2097998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ba86abc23d4c47668441265762a77b12c78bc142336332188c2f923d75dda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2055882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d20ca3fb9f46785fe43e3bcd5af350221534a8353c8f90f120c0daa6ab1b8. 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/QZHNB2059602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e0fe5a620cc601ed6ecd035523899057de55d96bb3c32f570f8e1f8632ce8. 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/TCABO1380837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb288d511ea45f845042843e0e163338b1c2b5b7e30f304a7c2c55300895e09d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABO1380838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7961f992cb4efde38306ae49865df2b6c72df7e525613701708342661e5ce300. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABO1380841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7caf50c3d86e2802fff43a4ae8a2dd0f0c0b4837bed52382c4a4666f7371a0. 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/TCABO1380842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97faf2dcc2e9bc416ebc323298c55289b0827803232f1bebb5c0120536ab7a9. 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/TCABO1380844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef05834c43ac7bda38a9f1447e6578fcc816f0bdd9dd825987735e644c54bde. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZZ7X2437279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea35c440130f64db7cdde1429553cf2f6b37be5968f30539872b2c99b03000. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWT2255855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876100c27bf30e7fd692932f9ad3a1db34e03f33992e17a699c450d2398906f2. 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/QZRP42198462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029e528936013704292adec4989a6c16a857c7defbd702e25d082788632d2a56. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2097998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d20ca3fb9f46785fe43e3bcd5af350221534a8353c8f90f120c0daa6ab1b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNB2059602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574aec72ac53382c977ec75d7fe2d8f9cd3710f4febad634edd7bf0a3f828c5a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ42035136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af38ad647e70a1d5fba99cc02a01a845c7ad4764d619429d846941cc3504b9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFYZ2063391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e8ed2e737ce1cf5758465021c62f37be24543bd5841f7becb691ad4d824645. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6P1924371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6caa2829efe757371b9c29ecf2a29c8d02623f7e043930aeffa6510981a706d. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBKPL1959100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0bcd025fb6e4878df5a22be18d96db5486da614457761565f8b53e2bcb209. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL1939004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d4cbf117e025fc2891a1532ee2b5bf5810f4a6052b59404e02f9c4d6d7b4a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1823850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3daf1def9edb9fd620651c0b53d15d821ac8bca8b4de408fa0c436280421c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZAPG1810649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eac27c0451c0e6cc0aa97fe9665080d4d7985f6b23ee075ac4dc10ba4dc1832. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UST8K1720801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48b8b09a473c03089a0553aed0040a72fadbbf30c45fb2ce726114c05bb2cd. 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/QM4DW1784236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9f4d0d02d1ce05da196063aacce2bdf1357a332709fb2e9167f624924c58f4. 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/TCACL1682599.