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 0x853e78a4f68ade659f251346356684b0c486fdaab19151cf00e3576ebb93d012. 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/56e4afc6-dd9f-4a7d-8429-133e1d33aeca.json and https://artists.proofprofile.net/proofs/artist/56e4afc6-dd9f-4a7d-8429-133e1d33aeca.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 0xe723257ae1176c50fe87b69c56f50de126115786e4987ab8bfafa969738fd300. 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/QZWFP2379231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f042df54e4a99271eaa9d02efd3a95ce478a226f2ea0e7073ee05997baa304. 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/UGA2F2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f6e446c91edc868b5659be9e30f5ac4968747362e80aea81864d54c0b86a6. 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/QZES52454593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf70d86c47291c913b50b3c6ca8462b03446ce90a0ff42e74db03dcba0c5a7a. 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/QZFYX2436190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f6cab3b3b12d63aea88c8bae784c1c61653d3c69f563723c4ac0b2f23fe23. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZFYX2443949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e7e2cc9af0b1bd7aa3956cd87c456746d57cba047fc0dd934632452a79e952. 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/QZWFP2385595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7f1d326377e70a6f84703d2bf05a7068dbb1c02b37ce2359b076f9add9d9f. 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/QZW9L2373063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b3a3c0316fce3048ea01d4116988aeedd0d696c5a9a1d0e56a2e72225a5d61. 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/QZTB42304650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c6f73b7ca2dc9b4d99d0ed997fad654cf48120f9d68c34e160567d1d080ad. 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/QZTAY2396375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa303d364edf4ff4c03fc9e655ab21d23b97b85f85053f0f4f56d67105f501a. 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/QZRP52376600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563d91173490ad34edd78d9cd7e067f9ce273887fdb68443adcc134077e30871. 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/QZPLR2372153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef4d13cf17c9b23ffa78dcae13e4a1fcba94f613821c84fa2e94cef836e2b03. 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/US23A1565163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7256715466608d92c77f6ba06e09e3ba1eb2bf61f0d601b1028d4c95c9a1a328. 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/QZHN82368155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c5a54535d269e8c60717b125f4f920872572aa12f759ea4101a938ff096ef6. 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/QZHNA2301351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb2e67f29e21ad707290dc66bc5f2e96d4281b43958a83b8943e35a0857e59. 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/QZHN82366131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41d3d5c7c0ae8a4062c308a4b935c29465e38f650c734afaa7428796ddaef7. 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/QZES92328510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea277b640f49910b52ca2d99b0b0be684647c37f56542c9bf61b4742975f3435. 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/QZDA72310208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b8e264dcc454cd89b3ce7a22b4902f984ff93daa8f828f2d958e0529b50eee. 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/QZDA42340908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a904d2616010fdf1fcb8293e762a015f2b7d00bb2b3a1ef20cb98c4a814594e. 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/US23A1557741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfee0afa211bf8c889655a94725fde26e1b9fd49a2871038f4b35a8a63772bb. 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/QZTBA2264322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885cf64c801c6a92f77ed840f0ef72124c0efba90c369f84a5a8b7626f863b3a. 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/QZQ4X2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6af9b957bd4edac259ef9146e150908ba30c0ab33464a432799f9763e030a8. 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/QZNWU2210638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b034931c78b6c8be86891df049bc85cdd6bfe0ecbe8655cf70548d8ab210c13. 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/QZMEM2245560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa89f4618680e23f2e9d9882e863b3dc32246104f90f7d112dc821c66953df9b. 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/UGA2F2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f471540163e5b2226f0700f31e00698611484ab2973853fbc646214cfdafde3. 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/USLZJ2240807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb489b9da167248264ca0ea7f13f616d86be0309fc17e60ff2e20cd2c09d7b095. 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/QZMER2331666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b034931c78b6c8be86891df049bc85cdd6bfe0ecbe8655cf70548d8ab210c13. 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/QZMEM2245560.