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 0x768f38bfb3543235093fd44e80279be1376e3045538bcace9b3e295a412b89ce. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/354a83b5-68a7-43e4-9b78-4ee954235053.json and https://artists.proofprofile.net/proofs/artist/354a83b5-68a7-43e4-9b78-4ee954235053.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 0xa679ac274aee9680fb3577a4ffa80bd68edf21bd6374d20f648df3a904916972. 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/QZK6Q2321197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fa5fd73e1ffac51eeb2a2ff69e78a92b11e3929054da111a1228559ca4a7d. 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/QZK6Q2321193.
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 0xb60be8fda702aac9265155d34c3934ed6e589f714c64b9b3f2be2121a021fd62. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6L2167559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9cc20442376745765f997c01fda6c527326c771ca40a26e5e8f079fdb10752. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6L2167562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93f67a55edcd95b1af2c3a7a37eacf6971b6b1694935e9cadfeb2c21485a927. 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/QZK6L2167566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44df632a5aa8617c8fee6143b5ed62a666605d579d7e9d539ac4d6f4b8888fd. 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/QZK6L2167567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898fd764876a007861c5055b2c02be7ff108e30f05d98d318b80c2e7e84886d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6L2167568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343f1bb058db0f8b58a9c9b5a1cc2acedc5203b1c35b1ba7b05175b4e2400326. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6L2167556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a31e3a8f6d2e1250f19de4c2ced1efdf1063b285acf16b6e5945c023f5441d. 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/QZK6M2380940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fde7d7ed9db7a7382b23104e081a3d75fbb33492bcabdd07878aefa7e73ea5. 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/QZK6M2380941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5353798c942bc4b7d4a1e28c89712d29df8405b0131e565f1e2976e749e9e21. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6M2380942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2372681de447cc799300bb2ab7ee6884b86aa244e43cbd0e68f5b11e643551. 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/QZK6M2380943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fa9eb1f4cd93a6db5caefc2a3643b1b77ee099b25211dd37bc4a0c7636514. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZK6M2380945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa62c2e586be36bb4cc261f5011be9a950a036119961b21942b6e5568c12a862. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6M2380946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c5ff338252499528f39d8067fd49ae441dd26e4a890c7ca5ee0380f6dde075. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6M2380947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd95f5b9209f695d43ee94af36b6a572bd4aa4dcc593a8d1eaef5663d1d55d8. 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/QZMEN2115322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63cb8999087cf7000ee0ad6c1ccfcefd8739a34808dcff20b714d9fb7354c7b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZMEN2115325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbe9401a87b447afa09040ae6cf47a6272b3ddf6b9501f88849d8f2fa8efa0d. 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/QZHN92232841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeb49ef755ad1df1538d63c2eac8be0c1660b237f8b5c37a29181cb64c17f21. 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/QZDA62400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b3cdb97f678444d45949243aa2e1ba0af66cfed01b0930040cf0b425d8fd4. 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/QZDA62400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beeff860992fbe9ec17b4351a142c2ca61758d117d1920b5bc13fbd2aeea2b6. 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/QZDA62400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55863c1871f8a4097d2ceee17bba48d7443d123fdad564eaf9d7950ebbccd819. 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/QZDA62400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dfef6fad6f2d3715268fee05a4b97da701d5147734737932227c1ad41491d8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZDA62400698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e4a93531e981bf46fd3577922a171e23c1810d0e9f834e83579590329eb418. 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/QZDA62400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58037b7f0e4c93dc5736bc77eeb5fab3cde976eb3f9a6a0ab501ac1bb2434e4d. 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/QZHNC2392304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cacf064b4744e60e7017411558153f8d26618c2569b7bb375afa4df789609fb. 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/QZK6M2334235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcc095495026653fa69dbc145e5308bb6589e49238f5fdbfe188ff6923a3ba. 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/QZK6M2334236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff22b2ce1cf1ef38224acb375d987f703f035cfd1b1438822e2cf52d4860a7b. 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/QZK6M2334238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e8fe07da0a36301964845f62a53c88b591fd384f18470ccfac2b50d5b0c12. 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/QZK6F2348381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf46b5ea2405bed2f9e0a755ec0efaba66bff51389a15d479ae4c14f638bca. 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/QZFZ72348448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c4a51b7047e0b4c10c3b610672a1917aacce1b6b5a499941b2b49b291cbb1a. 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/QZFZ72348450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077505b506d2a6fa56b44c741304182eeef301df7270c957599f9b414ff00908. 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/QZFZ72348452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae285d411a9bc0cd49bc10686d7ceb45c09b5acd244627fd82ccd15890bfcf8. 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/QZFYZ2322055.
O Canto de Raimundo Chaves e Família Chaves: Vol. 5