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 0x6a2b95a2d0d0ecfa4aefa9c3d29072b181284a2f89e66ed1e1aaa44436714500. 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/b66f38e5-6143-473d-95ac-b689d49f71a2.json and https://artists.proofprofile.net/proofs/artist/b66f38e5-6143-473d-95ac-b689d49f71a2.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 0x7a28e386abaa54ef0a0e2e90d03060af93162e53153d71b9fdf7d8ab068201f2. 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/BKLFO2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10235287266d12cc2e4ba829a05b1e65ac2dd35ed30d69ea144ebedb4285d4d0. 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/BKLFO2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d9403797236f11fd13167ed6ea1dde572ff0f8b55c0ab4e21b0cfd2dd6f2. 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/BKLFO2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55335f9bfc8d8a7d1cd2d8f72c052df886d57f8a8d684c3be96a62ff9799136. 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/BKLFO2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727c1ef33aaf7cfc69fca7616650d10b85604908af2425f7e1c087a20707b06. 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/BKLFO2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36d77b47fcb8c3ff35e8781ff47e491b3c284923d2ea46b62246a4ea51252f. 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/BKLFO2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15572e2935042a5ddeeefbab13279d0c5c7a2c18e4932f5d6282ea25913051a0. 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/BKLFO2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca85db6739a3a6cb551ac938735b0228053a66c2c7039f2948671dc5d83fe6eb. 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/BKLFO2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154b8b363e477e2d603f3e2732c64e18a04d09cfdc39ce1d76f926dea02bd522. 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/BKLFO2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3275c7fbc45601721fb8a910cf3e4d82331528e1183d0f19b5e72a9412f4009. 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/BKLFO2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bac4afca604a260c1560a00bb3ddfce4b4eed4200adf9cdd610dff36ad0f96. 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/BKLFO2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c4af13fdb2463e261b60c8c1fc580b6d2e4725a22f8d36d59dce06f3e8f88. 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/BKLFO2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5432a34e2313ea6a8449f0f351aade62f9a17de5f929e9082fd06a6f08156e02. 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/BKLFO2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15a753925a2bf901a21fb4375ef05ce243f4de101324cc6869f14c41fc47d7. 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/BKLFO2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f322b7a04acc10b52adc52dee3fa8a68fd030d9c3e2918a69aeacbf563b288. 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/BKLFO2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94069a4ae422b98f2898ab3d7d7393bb32c97835ece70b18d2552dbf01f7cd21. 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/BKLFO2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d9403797236f11fd13167ed6ea1dde572ff0f8b55c0ab4e21b0cfd2dd6f2. 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/BKLFO2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55335f9bfc8d8a7d1cd2d8f72c052df886d57f8a8d684c3be96a62ff9799136. 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/BKLFO2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf687613987d373a37e9df2556368d3b0d003c2c11859d8e6b09c4bcda0898c01. 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/BKLFO2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a05b228f509e6e17546190fa95eefe94f3188c162a7c0b4ea1285e58b3899f. 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/BKLFO2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bc0484078718a0fa709a9f88684caa06d137b5d8ed2cd82f315dbe9f1b2f8. 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/BKLFO2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb70e523009baf840e8482321237318caa3cc21b765b4fde2e83dcf0c318a67. 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/BKLFO2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18917a35b03a0b059147310d44ffb3f9ae7436dd8ceb1b7b6885de562708f21. 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/BKLFO2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212461b8a8df9df5b0843a7136558ea7b16b797c46eedb2991edea140db6cafe. 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/BKLFO2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab6c3d2b86c54a2d4e011f642165dab09d6a2014ea00232a33d17ed0be1f12. 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/BXPC12200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7b661e228105206554f24ff43ace6d0e0082f6d5772cb0f2a7885c5e6c3d7. 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/BXPC12100040.