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 0x8ce597992e5e59ee712dc4961664a2dff4b896ceb8b4e0cb94afb641c26ed86b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5a7d4dc-28e0-4daf-ab66-eb2a8b61be84.json and https://artists.proofprofile.net/proofs/artist/c5a7d4dc-28e0-4daf-ab66-eb2a8b61be84.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 0xa83a32cb1dedb8d456a97d396b1d156bbb4cbb588f8a7ec0efa5c82c45f28a2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAR12100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145cfbd0b13d033b60b61927ae024e49539b942fd6321d26c40c14bc60b1d2cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX92005670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea8988223adb76aed0459c64aa569b9138d0c1fed2ef4f113921f2053a887a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc63cef0205877ef13bb576c77b78adbaf7cc25a032fbd0089ab4fdc8d81aa. 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/USQX92102240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a93962831e019677d5e68175d8646e2056fcf84fe927edcb235eebd824a98d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49451067419fe635db5e141643044658c972836bd54929d58a33d843da19a29. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQX92004695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45cd3d3b4e47dbab83b02ca92e5a90ba39632c459154a19c6ada5425a29d08e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1f2008ff1f00fc201b0276e06a77fa4cf9362a0cb6e45b864fc7c77f534f52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee00537602379816403b26ed57252af1a6d66d88128dc01b560e1ad3a0584b1e. 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/USAR12200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5dfb334540a52f7551cb7e2d25ccb129ce5b7192435008cb1e50e276abd0da. 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/USAR12300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc829cd91d51645adc672cb377a1966b2bf89557848fde9b675791eb7abe745a. 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/USAR12200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc3e0cce369f5ed17a2b40a29335005955da0c7f92a704df958f8ed4a24ce78. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAR12300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4abf0a2257200f7b961284bd68dcd612c32cc9a920fc3f9f0f535fb906bed. 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/USAR12300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4abf0a2257200f7b961284bd68dcd612c32cc9a920fc3f9f0f535fb906bed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAR12300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5dfb334540a52f7551cb7e2d25ccb129ce5b7192435008cb1e50e276abd0da. 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/USAR12300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a37da7ea69130ac681c3ecb052edb2eed3e571e5d4769a4d7b0ebf5ba0501ac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2308925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc829cd91d51645adc672cb377a1966b2bf89557848fde9b675791eb7abe745a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125fb6eaf6ab545078ba84c0f364ca27c2a3bd48f230c0e5dda8b22c3a5ccee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAR12200472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a79d6b60e4724869ad9ff99284670af9a8590419b6d7436688496eb15c815. 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/USAR12200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee00537602379816403b26ed57252af1a6d66d88128dc01b560e1ad3a0584b1e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAR12200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c77291b29a827718a22110a103633a91844dfbc20fc6671d62e0c12032381a3. 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/USAR12100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45cd3d3b4e47dbab83b02ca92e5a90ba39632c459154a19c6ada5425a29d08e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USAR12100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc63cef0205877ef13bb576c77b78adbaf7cc25a032fbd0089ab4fdc8d81aa. 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/USQX92102240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15431167a6514806e08a55ff3babe18fc15ef1fbd8cb622bbcc5a24a5d02e398. 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/USQX92101252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1610c600e0f0eb84a5d371d2c3b20ceb877c164fe8100707c49ebd1cf91e90c4. 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/USSM12101130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145cfbd0b13d033b60b61927ae024e49539b942fd6321d26c40c14bc60b1d2cd. 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/USQX92005670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49451067419fe635db5e141643044658c972836bd54929d58a33d843da19a29. 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/USQX92004695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc375a00b3fa63ad5454eb3feb5a726dc8e632fe444ad8327f81d2c4fda1de124. 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/TCADU1861590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ca8c63bd55ade92ee7f0c0e1a15039128f0fbe65e5afa8ff816d12ca303893. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAR12400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3dfe18c203b05c0982949994ba890500d04058f6609b921d20aa2ab71aec4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAR12400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9334d7c0085a6c6239555e1868b472603be49edfd5a692c88ad6dd4555f95b12. 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/CAN112400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d45b9ffe8bfc824533dddb20331b5ed8e1b97fc95628d76555df2aea21a2ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAR12300491.