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 0xfd3ed7bd57cc9e33349fb37f8836de69caa52fc322a583bd7da4000644356f55. 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/7591f3c1-9aa8-4546-8d18-b7fd87538b42.json and https://artists.proofprofile.net/proofs/artist/7591f3c1-9aa8-4546-8d18-b7fd87538b42.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 0x16aba415a21a51e8470603447e6b5368ea7c0667c94f78a25441ec16b87df5b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF712307853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969279246e68934cca2d26ce780f7992eff510315a8afcb8426877d891a9a861. 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/NLM5S2000954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2788c811791d6f185a11609bf4b60455bbc9df930e68dc0f9c912e75d333710b. 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/USDM32462601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e71de6df984aa1167780cefae3081680a8c126e47da69cf3ac1ce56e85b313. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDM32461401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8be32c1d24793a1318178f9b193a51beab7fa5cf0a16958e3b3bba4d1dc471. 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/BEIW12000424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b0dba83738766e37b6b95b024db609e2b1947d83170e9153e6ab05bce786b9. 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/DEN062003796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4dba421cf70ca11c0ebda7391f1c2c78b83b440668edfe6d3436c473e4255b. 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/NLF712006026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2977b580d19dca5b46714e7299eb41f7ea71dddfde7d0d0b828765ce740f4a. 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/NL1ZN2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be57898a63a59e098227fff71c0b0a670190e700416c0474b180d52c4e1f506. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEIW12000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e9040d1589f0d6bf671dcc2f18655d839bbf895586b733d535274cbe05489. 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/DEN062002746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4304d3392a1911c7855083ab400eb779db3b88df6932309a3d82ada50fbd54f9. 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/DEPI81902978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26712f52140303b858486ed6cc08c5080dbfa20cac8fa9c373ff2aff8a0dd088. 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/GBKQU1989140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c326e9dca5e9e717d983eb32ddda3cbba7b83abcd4cbbf46f32e329742add1. 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/NLZ8V1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ab807f666534c60e03a9fe069658f4a6e755af2b713181aa7c4d757e7678c. 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/NLZ8V1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4149eade047957d85fedb2e84e78fe13215b7494cb361048f2a42274b53ac. 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/NLZ541801690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d214759581adabbb3336dfa453ebb4b1878b0cf345368a8f311afaf1f669da. 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/QM4TX1897007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ffe7d5ba9fbd1e1d6480f0b2e55c00d20322d93b844dd81751da2b96e8505. 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/CYA111800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c6bfa94ff434600a69b2c99f6a006b6e6f8b9e36f7ebeec0613fd138bb3ce. 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/QMDA61861484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d8f743441516cc28b60db3bec22f8098965121b0e366885ea15c5ea974ffd. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLF711709605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f1c465816d006baed1fa6c88cedd8e18d92d90a2415a855f25207a6691a217. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM6P41708625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3235c622af8e8b5f6ed7e5d2160e4aebf3f85df60abfc5f86e6e7e1c2b1a75df. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USDM31782601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c4e835146782548b9062c6d58e453e5bb5098da2c49d64dce5818ec86251c8. 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/GBKPL1671312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c282d76638bff64d410b10e83a9ddcc1b207aed264d4ec2ba61fc6e6512bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CYA111500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9336f74c22ec53b691d219e9a3caa63ba799de4bf3b94a87c06fb7c872e40f64. 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/USDM32465301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920c2b9862fb81f600841baa8ce84270fee705090fb3140c1ed4d8b446ea930. 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/USDM32464001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce51f953c0cafc6d8c58fe30e8e714ad053ef0bd25c0bd109f3f970a4e2e41. 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/USDM32466501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9336f74c22ec53b691d219e9a3caa63ba799de4bf3b94a87c06fb7c872e40f64. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDM32465301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2788c811791d6f185a11609bf4b60455bbc9df930e68dc0f9c912e75d333710b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDM32462601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a161fdf07329fe5fe7b0a8bc6fcfcfa04320d580bcb1610089890c4f8da3b86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQX91801079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c408ccc5249b016b1961ebd36735041fa88f229ebe60e3d95326949cd14f35c. 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/NLZ8V1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c31363cfeaa2fa6860a35ecd11ca1448a8332ed2739a059a0e1443111686dc. 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/NLF711603727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39737f7984164937abb0f1af74952b4a7596696547fe9fc66fa04f0a30c5201f. 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/US3DF2141717.