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 0xb32a5f61b9d790c5cf9137f9f44728f9204759ebe034e8d3833f70f44dda798e. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17f5c119-d991-40a8-8a46-90f651b3ed33.json and https://artists.proofprofile.net/proofs/artist/17f5c119-d991-40a8-8a46-90f651b3ed33.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 0xac3715d872edbd4e0ce8b051a6c37b655960a3b9025ee3262f76caa3976cf74e. 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/GBWUL1805875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa382bdf5ff0873fe63c35fe69a899135293252dcc2ea11a27b399067443865. 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/GBRKQ2214871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756f4a0821b2095858de0fbefdeadd062d80aeda929082180011d5535809edb. 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/GBRKQ2216515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4490afe5f7bbe7c86404c610bacc55e18777cd6e5859e62c22aceca5f7ec50. 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/GBRKQ2216540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5981ea31354534a5ed5bcbdf456393e3bf202547feb6f8193415c000f8820. 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/GBRKQ2216577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d56fa91513146e6c66966bbbc12fe5fb2acbd11f36d07cf80067d493ecd7ede. 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/GBRKQ2216589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa778d5e68f0439ece08d6fdf9ac9c735af1956ec078c2aa2b353fe6f78cc56d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBRKQ2216683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa43700af3d4718cfe794a413cc0015b2537b47313cc073b299bd5193a08f5f. 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/GBRKQ2216691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31381183f178fec2b1fce80f06c918fa90c135fa34b9ab7aa887ec5cc78adc81. 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/GBRKQ2216701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224aefb64f2b5c6be5430742942059af63ee2503f3868294e8a57f387b1be910. 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/GBRKQ2216739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72017451702cf2368ac5b8052658241e90af897fe9e84c3318ac7e6351a97e8. 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/GBRKQ2217133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e17bef75b43f53da1015f18d167b0fb53611b29d4ca4de04535d0dd5c1acb. 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/GBRKQ2217135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe55b30bf76c9f1d542beab430c4295e4fb65cd76745c0030887cda55125982. 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/GBRKQ2217138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7161688634c97fdaac7631bc841f65acafb084ac1b013ca62ec07c3965463c15. 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/GBRKQ2217141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330737a5f31a6074947cbdcea9df5de4ef1de716cc4c884eff451a96dd2683b. 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/GBRKQ2217145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfc3d9ea92af0f812184d90378a6fe7b80b6874110891e283f248fcf522168. 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/GBRKQ2217151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a9b8a45845467574583b41b2d437a0a56cc4216ca111e13192ab605ad13a7. 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/CAF5R2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa06e6fbbfd9a4bb36f99c42dfc94734fd26799b74092cba0cd6306b121683e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CAF5R2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83fd322101877d718b83dcbfd5eddc8ecf056917375f7ec1cd094bc669b0e1b. 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/CAF5R2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30022165a6feec5f288466719913cad5282b119f2150bdcd4ad0e8b8b92fea5. 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/QZK6N2026601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a185f8e92db4662855767ceef42e9cb6acfb951ae53c8cb5a9ecf8138735e. 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/QZNWW2141135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a207f1f51edc26929b75c4e40f58804fbaf0f40eeca4881b95417722e0d5915. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:49Z), 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/GBB2M1000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69476a93f5ae758744d7a8e2205d20185742383d25b48cf43591eeb33eb18948. 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/GBB2M1000192.