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 0xc5a4dd9a4acaeb6268b04f5d66fc02dea29417e2fb066f21005e5840d8e264ed. 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/52b269ca-ac9f-4c7e-8513-9f6d7104e3bb.json and https://artists.proofprofile.net/proofs/artist/52b269ca-ac9f-4c7e-8513-9f6d7104e3bb.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 0x69f1a5406801092aaf197b67b7c3cd34e61cca14fdf977781317455b2fa55b40. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTBD2330663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7143802e031fe148ad6321808ff3f31dbd133781d6d7334a094cd3d4560203aa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ62278041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51feb1ac23334a00a6de73c378aff82fa1024379518f4adee7cbc978f300557e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ62278042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78973c972dcc1bf023c12c28e84996a6def15d42f28b6d6f9468c8e990dfd203. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:05Z), 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/QZFZ62278043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec99287daa6d78891a68d2a97c73145e00a547a6812742f6481d308a11d89b82. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ62278046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf075f29e892d1ac8a14721a8c416d85b339c6eb6c00286104a96e090c867adb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ62278048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5496fe5b131e5a190c400ba57a812da95e5d6430fb22dfb367112ed9dee283d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT2VB2414795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403517921604586512fcab5e7933247b51069fb867ffd8ce4cfc5a1824ef7ac. 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/QZTBD2330673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102c8d476e097803f98c8c3a11532343f98b93d9cf96a67fd9818355dab80e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2371780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22389aeba423dee87118624585907124681b9bb616109f697c9a5bb89550eb. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES82477825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a6b8b749dd9401a502e118e9674a0d9ba25f662bbef8e4c7fbcb061ab0f0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT2VB2416513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ad68af4db315e0263f763ee95b46ad34d15d2705fdb70cfaf3770315c81b19. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QT2VB2416520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a2a18a75ffe9088adf021d983d99c9df5d7290e73c4a0bf5b84142456612a8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZVEM1809439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc173d3f780f574be406e1ccf8f30b1de2a9d8c4232b7649c0d95545cb3009. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZVEM1864364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5d30ed4f22264528ec4ca6d4b8f05dcccca47a533008119b45abbcde17d5c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPEW2521650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef146f4647b4b714d6ee138c8879bae95b5c5ac9fd4ae23ab0a1dacb8a05add. 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/QZPEW2526824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b13c2fb386e613041d53a403c32a36df2a20ac32501d73fb3ceb5de6277d6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZPEW2526963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecc15934c1e2ae239e3b2736c356d140d974a8ab5d857d71e0c257f20c756ae. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QT2VB2506055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31543ce38a31bf59b545fc5dc8fd15c450057d22532cb766c9e3ae6990a8f8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:40:28Z), 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/QT2VB2506060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d375dc0b1a50e9cfb49784f24679aab847d48ebc63f6ed2ffb3427719dd1d. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QT2VB2506064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf82d3741357e4cbe010e91aaf92594f55dfead52eec43fdd8ba6def2364bd3. 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/QZVEM2557880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79a31de7cbc1177f6be964a27f6eaad8e5febb164cf1a4c31154d4bff1eac55. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:38Z), 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/QZVEM2576422.