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 0xaf05eb06d802eecbc05420ff103c1b73c45523d7b612a7876780ec2ff88bb087. 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/8385f375-a13d-432b-b8f6-8fe5cfc3cc40.json and https://artists.proofprofile.net/proofs/artist/8385f375-a13d-432b-b8f6-8fe5cfc3cc40.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 0x139dcb04adfda4ab837c0ebba0050be269ffa8f7d221dd541c28150ec9f1bb44. 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/TCACO1683336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7214fa36f2a5ca4fcbb7ac145436282f351fda6a8beeab8337993f7a3b680b30. 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/TCACO1683476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37b4762907b9389b0a247a193958e1569adc41a3c74f073cf5494be4a899d1e. 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/TCACO1683338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c60be912cffe576f81172e2f1eb4fa28b91cecb9bcdc42b52a247fd40e3a74. 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/TCACO1683339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5669e62ef6d3c7fb6f6ece1bb6f23c685965167479c45cd5ab19072822452c8. 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/TCACO1683340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843407841b49ea4945c8a8dd6fcd9ca454e8aa89a116cb2951f1d4ecfcbf021c. 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/TCACO1683342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f8488e5691da4928cdcd14d24833baa0e2215ae2e7b7f2dc4742b795203f8. 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/TCACO1683343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebad0da7a042051bed3449c82887896e1931fa38c0d0dd5c2a07efddd18f1dbc. 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/TCACO1683345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90a438a10dc5c418137234d002380c33874c6dab8e2cb0266b1afea177c9c4. 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/TCACO1683346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e009c94879c0f869369a3d318e270da850e414c4af5ebe9d1c15d86c3cfb7b5. 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/TCACO1683347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1919ca3b18b4e4924317833998d774e11f61aacb6ff9bc531a3b186786b6c663. 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/TCABT1462210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ad348f0767eac2bbeca43a207838d9c5529b7acd742343d121fc32063581e. 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/TCABT1462213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc498277ceb36076a275ee3cbbba6bc090b38c7b498ac9b8befb421f27e47c1. 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/TCABT1462223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26389d305580d8c78a64c480c26a133aa35101ffbbda8192a40e3c74923f4a03. 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/TCABT1462224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e56db4d86ee4e55f77358713b229a0098a11e1814d7ed4a661eca6bb1ef120. 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/TCABT1462226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7100a1f7b9f2815bfdca4246ded2e5eefb1da084a171e9a118f33d7de538b27. 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/TCABT1462227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5f0a2791b7e90fac0b40ff1b50697665d0133891a9871b64a4caa1f16eeaa0. 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/TCABT1462228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1994c2f152340aa3bc64ac583182905a706d4e6316477ab20c47eab637bf2115. 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/TCABT1462229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610a5f28792ce4c587fb541d328202932da8a2b033844ef204f13aebc31439aa. 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/TCAHY2466407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278d4b9a44215fc44431aa145c95dc1bb29deefb65a6484e91ff904091d40793. 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/DEA622300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ee7e998e6637e83336912b7fa39458bea77fc7aebca2f8ac1d7d251534cbb4. 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/TCAGN2253810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d158eee740a25a3aa32c03c252fa846578fb286b872a977124ce2f8d94cf19b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAES2064064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548fc833d7c52a0e9dba507178f90b13deb14de0c2648ee317f274cc7a22fc9. 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/TCAEI1928582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc32e656507729987723efa51e618bafae0e476d2bdcaef4d86d3573271e237. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCAEF1940486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f90dc89f8c233123fc1e00bbd7a45e8b7bc9c1ab8c6404fce917909f3a4c461. 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/TCADT1828966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aec46c98d57085da2ba7e1752feace962a818bd780099ccfe86cd81821c3a4a. 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/TCADI1749910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0674e15c8a42a41ed53e798347bba03532f42df0f279d32aae3cc8d5a53e5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADC1706336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b01fd6a4c804330a299150eec1ad9e2475543ee37d7e2ff0f161f59bb248b7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCADC1706338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a1ab289861ce2af847980a02baddb541d24748374d864dd8d38b67e9c3bd0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCADC1706350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e31621abe84e32722fb66d9c4fd83c5bf0ba5b5f64b5182d38f55bf817bf5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCACQ1617500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c98e4d7baba28a77215679f583df014ca440df57d1e1f109955a2ac901331. 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/TCACE1590511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b377c686b8fc3ad415f265c6658d3593ddeee816a2d78e94897efdab947ad24. 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/TCACB1433992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe8180f49695986412ce4334772a7bad3cfc289139d9fe16e677ee8466fa59. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCABX1424924.