The National Broadcasting Company (NBC) is an American commercial broadcast television and radio network, serving as the flagship property of NBC Entertainment, a division of NBCUniversal, which is a
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fee461b2b1345b4e2772cf86128ef2ad7410a83cb3e1ee476d559b5f6156c70. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a2e3246-09f3-4363-ad01-d1fa460549b6.json and https://artists.proofprofile.net/proofs/artist/7a2e3246-09f3-4363-ad01-d1fa460549b6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e11515958abfc00e6ef51621190628030569f0cf9e5a0cb1f98b10016038e07. 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/PTGMQ0701502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a06434c2356f36f14c207f315b07d8ea8db7fb11c299fc80d789100094329. 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/PT7EX1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662be50560170dd5451a42103da6409666f5c89a233767f7120f35ff41fc4fa0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PT7EX1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd957a5fd96d57f7f4aaf76fdfdb4b9d9240f3fff55ada4b61a078bb4323d72e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PT7EX1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c65a1d9f5853230146809e7eb30fdbaa48ee9a1ef2b6414ea68cf56377fd2d7. 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/PT7EX1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8283ee48bc031f33dd435c70eb029f47731a1555f3792925692ecb3b71d68b6. 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/PT7EX1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c77e210c4c0cce682a228ad88cf5b021c91a8a93f5d2897aceaa8678c3623. 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/PT7EX1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb10767cf0b2a8477dd8299cfea6838badad2b30a73dea8374fb54303aba11. 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/PT7EX1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdc47428b513c04262826c00a4c1148fb8eab078e1f3ee714fa573b3e8d0fae. 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/PT7EX1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7264a24c198590793392a650dd9e665cf149ea95e145862124ef30ea4d3e115. 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/PT7EX1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a089fd9a768aee387cd3de8b8b18aa0d66760caf1a983e3f62a075609825987. 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/PT7EX1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4028baf7f523cf244599adece06411b764d2587737dd4db417e98f569feecb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/PT7EX1600011.
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 0xd39c301954cc5aaf6ca99993b2aeebb4ac5eea66eec53d698290557a5e06cb4e. 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/PT7EX1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f0bdee46abb329a020052f6aea04095dba542dc60f150f5ce71c35cb3040d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PT7EX1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709132f4a47ba87b09ea0f4e0fb697f1eb8a2e5bdb6260f3fd7c97be87d9b9fb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PT7EX1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffe385c8a9d3f9aa8912615907e8bf40ef82579ecdf12a73519632c611dfd4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PT7EX1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670898e592488c44eca4d211c13840008d9a672ba2eaf7183b29acc59acc85d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PT7EX1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e1418a4df56ec0f57d0727297142d51b5a7d56404e1c24ebccbbb8032a1e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES71G2507356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c4f11abbf4b988fb0f198afa5c6524907d884d5ca2bf89cf71e6f3f9e6d34. 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/PTNS11800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f098dcfbd25657fa66278fbe6a0bcb7db0288322af534c3b833310a19c259. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGH1496441.