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 0x148cd7b532079e01a53b1dc535e9c188f84d8bc99a2bd991949bd55fc5c4f335. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c793ff59-04f4-44f0-9ab9-872232f784ca.json and https://artists.proofprofile.net/proofs/artist/c793ff59-04f4-44f0-9ab9-872232f784ca.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 0xff4ab970d8212cb3a6850690a727fc5b464b946013641264863f6e7e6af16ffa. 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/QZES51837190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d5c2621eb29dfa5a3526859a837e768c5b5c24938d6fa1623db5bf0dfc5b9. 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/BREE20400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e70f03d35e493ded97bdfb8b7c66b76c0506ec127934e9151424126fd701dd. 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/BREE20300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef0df8213033d72590594e41b2763624e22674fc479d31881fb35e6f4e697ed. 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/BREE20300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfdd3430c9da173ded9ed0518c905030e459615c3b72bc43546723b4eba8bf4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BREE20300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b4717474e86cb924aa30c12abb16bf1d93bb4c1b70c7448a1d019229beea37. 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/BREE20300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e397353ac75979241a531cc8cc1eb8cb053d776ebf936b989e278aecf10b3c. 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/BRAFH1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71609d8557ddedfdebfe1ae29854f85a62ee4630cef1078319a67c8caeb740e1. 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/BRAFH1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5832e4c8cbe48cc8e2461174e5f7316224b3cdb1c0fee665b83f6ee201fad946. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRAFH1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad04f8074d6be32a1b115a184db420049cc448dbef30dfe38d428ddb022dff89. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BRAFH1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86128e023d24c3db2c98e793f52690576771f2fe0b67a6e2f5ef53f823d512bd. 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/BRAFH1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958ee1f97e27e5f19c2325ea03039be50e6369bb3d9eb25b147cbdd555fe1dee. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRAFH1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738a49994173944ace8a9916d1553e1957e52e80e43fa1d7d91c7ab3a064ad1. 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/BRAFH1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d671349d92cf872be0f198372e986bf03fd92a43c0ec43a08d573c73d0b360. 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/BRAFH1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec6ae2a35079ad515c6965bd85439d152d9f11043fa0fe27a04a4d932e5f15. 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/BRAFH1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dba0f09473989dd814ff8a2d3155ad1b5c147b0a30f63b47e19708d479792c9. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRAFH1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b55a0961a745fc65633bef568d871fc24928cc08f32a9fd4319e0e046feeb17. 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/BRAFH1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808b14b345ea2e473656f202745ba9349470bc15f6b8e8ce60823bb6267b77a. 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/QZDA61857078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6530012a95564b803ac9e4e6fc428c9e3667adb8f8298ca474d1b8df12dfa369. 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/QZDA61857079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1930c1f8e6d3895f7c2bf83c4efd826677e47a3f16a6ae9bd5fc64fe80587c2f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZDA61857080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139ee546e1749d19b855ce0f5f93296954e35b025e116079ce14d7277e240fd4. 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/QZDA61857082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5e443cd6d7709538e06cf35fd3a8ff740daaaead959c1fce574ef24b0b2305. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA61857083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c03063de104fb3a150ee0fb9cc22d15c907a4bd8c448cd3c1c50e146e8aab. 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/QZDA61857084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04fac58d827f0e7d0c72e8e4c2b4eb0fe306d478fe2820a9de58db1990da00. 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/QZDA61857085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788753e70f497e32bbcde9c2dee80eef5193a505c0ba27f0e6ed93fc21116799. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA61857086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c3d7c5f53af7c1dd77a61597863a0b69bddb6489c2a6a3e2623cfb1adb0e1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA61857087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7469f7ce74a242938d8adca7e5061aacddc93b6c162770c81fd22f09e8fc85a9. 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/QZDA61857088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad890dfe7f627c657f9672d9cc24ce82868d76e5dfea8fd4db7105e6707b71e. 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/BR5GB1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7cffa7d6eff96a7ea426cdc54f0e877d835e5cd6c9f6ffbb4c9410babca17. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/BR5GB1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4d0ae07048df11229006b80d8834ab188614443b8602d56d958be6f932e82c. 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/BR5GB1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca27047156fac3b0ade8cc71931860256281bec35e9748780edd76e62edf1c9. 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/BR5GB1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca81ad8223e1fdaf95f12d3094a14b773f400de7a4988ba45e984c5e1d4aac53. 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/BR5GB1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a3e0867bb4d2d0c78d13bf2d3bdc8ae68a9e38bac31768a14fb36531f30859. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BR5GB1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e2a42ce34f9c4755a8dc81319130a06e8c46ead50b5286d072f986534f5ad4. 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/BR5GB1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e65452d3f942acce52dbb8a204288d7aa7881f0673356c00bcd76ad912bd30. 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/USCGJ1914235.
Catibiribão, Baú de Músicas e Brincadeiras, Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a59a8c478ba55c52832b6933dd56da97d244c3bd38fb3c237802689d48d00e. 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/QZDA61824241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4834770fe27913be9ccb8c47fdd3b9890222b89241234367788306d7456813d4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZDA61824244.