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 0xd4df4908a0559b220afc9bc5831e283675646143f6aaa34e0db7bb3683fe61fa. 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/796ee6bb-f6fd-4857-8c84-30364aa5e157.json and https://artists.proofprofile.net/proofs/artist/796ee6bb-f6fd-4857-8c84-30364aa5e157.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 0xc164ae56eacd9704719c51932524efa73bc1ccf4d962e0c1dadfddda6d87ed7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DECE72104421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07fbc055e7cd25d33d8c9073427ef1bb2ab2a3c6e4f889130d70de6503a6c05. 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/DECE72104413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59871d030ad4fe8758d6963bba0e5f969f15729862bdf1a43657327df782d836. 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/DECE72104414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29affa5d3867e7761ff7037cb1aee7be469f28db2978c073a248fdaf82159138. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DECE72104422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36446e32e926ef3c15d50f3beed0052b087cad654b0b2b1b9373b32940123b83. 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/DECE72104415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694b9855562da36ec8e0f6880ba72f32a5dd5ff6272e1260bd04968b4428ca1. 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/DECE72104416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a222fd060a653090b6a979772eb77e954b68f2b9d3e039e55a1c7138dcd13. 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/DECE72104417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0fabc289b8ac598bc053daf3ba18280b20408044b9325d49789b22b2344ec. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DECE72104423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901ea328d15254ebb5a9e0a30e2e9e7d99b16ed3071258a193549524b211fd74. 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/DECE72100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd508b0b451f65e51711ecd3f70ecbe4fa154f9621aac37b22cc6142033ddfa5. 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/DECE72201902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385004828948ec7e8c9848dc19a5bfa9a7ff8d8131dd7f118bfab34822044974. 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/DECE72201903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbb8912aaa9ee9ec7cf3003a434afce308d7ac5ea27dcd58c6d8c0f33c812f. 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/DECE72201908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba9507e4416569f5a628c94125f9a562ba5f5dbb2e763b1edf689df327c16c. 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/DECE72201904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610b2dec52a9090ccfd1a9ada8254f67db2c80a329f0e067d8a7c60a3be94294. 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/DECE72201907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22657e3fddbecd3d2886038f26bff881a34b042df4881183291191dacd29dd2. 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/DECE72108178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae27a7e2cd6d52daf32ede1573c2adfdcc7d466484296635e3b2cbf25ab87d. 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/DECE72201905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c1adb415dee29f40af11360fd01e6d819836807fa14fe73c256f1016529a25. 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/DECE72201885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664ec3580414cf15d0255270679984a14a075588df4e0a7393b4ec241f0fd64. 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/DECE72201906.