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 0xf9a67c63f9ed6f366dd56754cc59533ebe66342b742393099dd7047566a46702. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ef62abc-1209-4e6e-937e-d42276b28550.json and https://artists.proofprofile.net/proofs/artist/6ef62abc-1209-4e6e-937e-d42276b28550.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 0xf56d2c0ceb0aba93790d56b1a0febe03cc85859d6d4fdc24065d6a093e362ff9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMER2335093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d63a50900049a6e9b929069712b33c65d887ccf2d31f7c4b7fd0afcbf8760eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBE2440805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c33b95dab8e51abeece08aa83ad159dce536799bb6971fedc358f0b42c7062e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFR2413689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256b58e5784d3a86d59ca0b534fba3328a178f530146a3a875bb21b6ebe7a307. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZZ7M2496880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c85f7c4f260fd484a703e6b299a79a9cab084e410b6cf09739c37560e66071. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:29Z), 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/QZZ7M2496881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e899e719a94921a96373416211b235d22098f2fda04e10c4d4e36538d91ee4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:40Z), 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/QZZ7M2496884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b20b6959a7c0e37ed25f9578f470289f75cbcb451ab91bef377ec63b863c51a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7M2496889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab8e35a223ee70a5ff7960f2193e6ecca8df4e1397491b6ec05ab802ac9446e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7M2496890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12aa5dc8b4c90ca1d6c98adcecd54e9cb08112ab81daa1845719959d18c0d19. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7X2454260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83425b28ccebbb885d817e9f5271cf97b0fd411c17ab95ac90287edbf136ae7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZES62505955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bfe6e1c9e0510a9b590eae91769b7ff58a2cbddf985c95fe82ad170a361898. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHNB2527373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9cfdfce4c9070c660c1391d5707f6e25a1d1823320823701b24411af32c03. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWX2575373.