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 0x2bba52503e29a7e5b776efab788b54459c9b0282c34d3d6800fed0abc151b068. 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/a77f3657-f773-4503-a6ed-8489b76d1bff.json and https://artists.proofprofile.net/proofs/artist/a77f3657-f773-4503-a6ed-8489b76d1bff.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 0x0860c1b0ab6a5f213bfb009905373a84feca05ffbeb3c23c628f34b377688079. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARF098400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6e9a6127354030a9affffc07873181497182b54617b0e8cdfaa933b647731. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF098400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3c872ccade920cc9dca80037f5e090f73c15e66ab7725e311901e11d25954. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ARF098400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232c84562e8482d49a9f466e9f0671ee2123e84cf252c7ca7c9b54b2ea34166. 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/ARF098400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a1fb3e62484a225174fe2531999281f4f4e21a458f535d1dc9acfca8a1b32. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ARF098400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80925e6ce6d439fca941239300b5a9489214d198ae6350239ec17468bba4daa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ARF098600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a604c906e5b85a0689ac1e17deb213dfc5478f725a4d820baa4368e9b30caf. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ARUM70800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce5f1484f978fb104a0f7e0e60ee0b4b4b3e8de960e1d2c749e0ded402d76f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USV291473903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b3563971fa987565998cb0633c4e5158e50ada891d1c3470c676851b55a96a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USV291473906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9615592600b453b2847f053085d6892cb40d73650239162c997697883e7d1923. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/ESA031317418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0054387d7c3383a5e2bc87750aa954e43739adbbdaff723d9abc2c2101bb8d74. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ESA031317419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ac222130e19851b304edc9e00aff53f6d51e237152b9ad1ca134004e8e3c41. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ESA031317420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91394fd55b16f2f2dd60d4fd2a882a373d6d496524b81f63afe5b8c90490602c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ESA031317422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a4f198cb778cf76a190932b0554ec9914376e7f7f798322e230932fa2324c8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ESA031317424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d7df64859e8ef5e22b638779f9b6773607765eb5b73f6091b801b929db04c8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ESA031317429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72792a496f1afe6e09e9773560589088fc0bb4124b4a71f68f05ae81bbfd8aed. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ARF096900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8009992042b854392298f5261b3a005ca18f5d154c051e6b622d8dff4d49ce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARF096900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232c84562e8482d49a9f466e9f0671ee2123e84cf252c7ca7c9b54b2ea34166. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF098400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d7ab6b629cf89f64588a14779538bf659820b40fd562729e7eb865c6c8cad. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ARF096900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4bb8e972978ee8764ae250eefe7d30d8ac7c123cf549ee3f03318160ebe8ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF096900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352d7ac96f6e529f29b7f50f2b536dd638ea581828cd77e0f53f684268dee29e. 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/ARF098200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eebd1d0f9cbc5b8eabba130e926818f6d83f87511b02ce00f51d68358a12b17. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ARF096900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0860c1b0ab6a5f213bfb009905373a84feca05ffbeb3c23c628f34b377688079. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF098400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d29119ab0da5ce0367abbecc545a09ebe88b9c86769c5f235c90a8341afb761. 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/ART721410241.
Argentina de América (Reflexiones de Nuestra Identidad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c865d1eef72c836cd5bb973cdb2792042a51f8331ef9af4efc2deac0ef68f9e. 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/QM6N21793059.