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 0x87bc4d3c1c0c4444d4a8f6cd7d25e952d57eb8b88af70110663c1da7b8460528. 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/79db238c-7d08-4d2e-8b0b-4864656ed126.json and https://artists.proofprofile.net/proofs/artist/79db238c-7d08-4d2e-8b0b-4864656ed126.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 0x458f59cd2bcc74330f4a7185774bd5d6f7f438e75141f07e83f9058d1f052a6f. 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/BE5KW2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5cca8adb03cf9fb804cf9dca26c6a1b517a308c8ea81b9c9dc93c03ff32da. 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/DEY472274525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca629116e018a2c855066d4ee7298b95b16d29dcf02841dfd57a8b26b164638. 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/GBLV62312036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8710ed45f71827f080e8f43c2ce8a0d30ea98f81ac788e452d4465c98e6bb7. 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/GBTDG1302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317dfc7ac0345160e82f08a441c17f9ab4d11658e5da333c6d65464779b13497. 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/BE5KW2300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfad6aa73861dfc52c80491e236675f88c2306c05425dc138074a7bbd41e0747. 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/DEUM72311392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc222c7318bd3df1f20f9e31ae85df2fa95a6fd815b864432a036dab97c0e76c1. 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/DEUM72307403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d523b93751a5d152357c892b56cac6f673dca5525350b99f853889c95477ac. 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/GBKQU2376326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc38f7c32a4d9cf36b22ee5c30426b5e04ee42445b19060716bef24f5004a0. 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/GBUR62000663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c80d63e5c20844c88996cfc51cf0d58f5688a4c59b093c97c394396668e93. 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/GBKQU2342681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20533b1d7dcbe9a417e8cd14de809500bcab8ab63a06b808adc531760fffee19. 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/GBKQU2325023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388d1e984527e23e8776b9bc322210995646f80118ae8bfea92e6a373a481d5c. 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/DEEC33500902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba34c6b9dc36af67e4e40f7a8b663f5576c211a2eddcda42438be7a88b26b5. 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/GBLV62204804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8757d3da82d9159efe4e4e7abc50c79b082662399a2d4eccdacefaba537ca628. 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/GBKQU2292203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e783bc2f7d47d4909eb898e976590da355d7ea19dea5b1f9075bbeb1acad86a. 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/GBKQU2271257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28b6b9ce8f5b0baa5139184a59d7239e4fe543fe5cda93fba59ff370503a0a. 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/GBKQU2243064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcda8ac13c2b0088e5f4f1a137fa4821364d8a5d67a417723daa819c5d2d73. 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/GBKQU2223114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e71623fdcab6f606f0b87d67dd15e5fe76d0af1aa11f361f95dfa0057cf9f. 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/GBKQU2205947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5599df89554cf9cd4f0d738b1ce8aa698c55e0aa804e259f1b64112fc503f82. 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/UKFHN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ab7e6363e44bf123d1cddda8f6a769cef04c7a2f3b90e28972b93596b1051. 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/UKFHN2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9265f41406743aea7eb24cc7590c45441bd35a57f7093430f224cb59eb5fe. 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/GBLV62120643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b17ba43fe9ea296ce751255a04783009b83956a7cc54dec0b14736ca3657aec. 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/GBLV62105591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b8c3b46abee844ebd2d3b8d610da91abdd5d6b93b365e92a0c99129e1eb6a. 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/GBKQU2192729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc1b105e2f8046faee5aa36716bca8bb5968490bbaa797177d1e3308505048b. 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/GBKQU2182380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e2ca4aad1372021be07aa1779561e7a3c334ccae1289b79746a14e9d01f9db. 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/GBKQU2153282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab10c6fb52631942ff4d1a7b91dceaefd339fceeab8b53e5e5dc434e3252149. 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/DEG932101853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b20c95998314d961f70bc9bddc69d979b5b51cd476d021b50b41f580b764ee. 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/NLZ542001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad374d305e84a7e0a2a306746883d97f1d0768290ff0a2c4b7880b14806e494. 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/NLZ542001509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8803d5c99d902ffe1be9ba6cf989f1a9b95448a75fd64b6614fe2fc0b2e579. 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/UK44M2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f262a3d736a53dae7478b990dfefca150b31bc2f4ea764d3036fdf220e90cb5. 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/UK44M2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f39cfb1eccbfd894fe4a5d050a06a713255ab62bd1c0917eeabfaccd3db82e. 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/UK44M2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f97657149663a91544195d59bed1bf584952d8b5e02b9f06a226f126250398. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/UK44M2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09e860d359e9c5132d1e777f919aaaaa17956e435fc1efbfb54d5183cc5891. 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/DEE861904186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c431b59b72aeac10c54e8fc872b854839eab00c5d28a1503a4e5a4f7d6b9e8a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:26:20Z), 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/BE5KW2300460.