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 0x920c28fc88de030a38a8b0797874264c026f0b868f50f2e356c8a2b49d4846e2. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37836b80-7ab3-4763-8860-cf1d2f278406.json and https://artists.proofprofile.net/proofs/artist/37836b80-7ab3-4763-8860-cf1d2f278406.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 0x0e98c28b6cc39c8c7a6ad1bd129c6dc91729fb5f67d040230a3414dca701e559. 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/AUXN22252009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d17e9168cfd82bf9d71f328b661f8b0b7ee614eca091904600ba97fa5bdfe3. 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/AUUM71800574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cfb91e38e150f6ef8148ec1b44aa8174892c99b325f671179627c6cd31388f. 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/DEUM71807062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e8c9b27e2f0b00bd65bcf522e4fba889c293f47a724408f236c1ab7120598. 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/USUG11903589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aacce7ceb6bc78b8572c6da8bb7b6ab8393a0272db166a3c6f596f90847e7e4. 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/USUM71710831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa63235038c0f0d68c28cf3c44f95090145cb8017c7d38360b31bb60c4a138cb. 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/AUUM71200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a9cdd8d4ec273a9b1766b0a3c467b5589b335c8f944a6edd42e4317092c0a8. 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/USBN20100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956b6087eea5ea2bf45680fe22393a3183619056c0ad8cc9539f541a2a0358b4. 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/USUM71911283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c6f01d15201f587d3a89d18cfe6922a2f9c657eda17ad2df9dc67ef3dc1ec. 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/USUM71204501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a1984bb09a038881e32f3e5a0e00286ca79dad332e6735debf28eac627d5bb. 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/USUM70609115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef34df099a121847938a87fa1856b6b159aff29746b00d0a03a48839a5527d3c. 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/USUG12100342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73e4ae3ae3733a2cee90275795073288127701c0ed62d9d67168cef725cf9f9. 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/USIR10110358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8bf6fbb7e72d76e7392c69c9e3d7a3e7f523f413fd832b8ac5e93b7aa833a3. 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/USUM71702833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00cd84591824a7f0b587191d15a73071aa5399827261c2a42664ef783a62efd. 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/QZJ841900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba2469923b24fb580bf0a65d6944811181d089a0921c3942865dae3b644c20. 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/USUM72102562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37488b6ecd43b5fe38451d46ab1676786be13ae9c8976da5d36bbde03c79366f. 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/NZUM72000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92ddcc0b9239d86f826e5e2d43148ec523e071635df5c7f5c424ef7c264e78. 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/AUUM72100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975c8a57b65b89cc4d47062fba598c192a9aa2cb02a5a62c5b6c2a671762ffb. 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/NZUM72100178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fec9cbf201b591fd9137e20638ff527e3718001bfa23afda894fd60a9e5e1. 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/GBAAM8600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fd78c78e506354b7e6bfd19a09b3a202e519df69958d1f4ecef99d70e50932. 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/QMZSY1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294cd98f4a9f31802b46262a4d9c084282be569356ecd1f3f323db433bfbdc04. 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/USUG11700631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d0a3bf022793e70199959fb4154e8d87e209f9970bbd4bb5e5d4f675112dd. 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/GBUM71604513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97995a1efbb72e2ee096e96a341ccea101d705c25e9c94d40d7d57e02175cc4. 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/USMC60400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bdbe93d9b1704d832d55c87156254f6c50b474c19fb48247bb5ec85b966328. 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/USUG11801654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e3a57140a09be0b2bf4f8e68d51505ec073011ed9aa4d01890b6249dd6f9c. 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/AUC1F2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550fd929b95f120948e9acf0eda114f5acdd9971aa0a06c219eace362899421. 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/USUM71918727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d26c6c805ff475bb76c1fe9a33ef096ab0d2ec079a7d7a21a2e49f0881494d. 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/USUM72017013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564aa837878777892a87147e120f866c09db7a7c7701c5f06adfd978f22815b7. 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/GBAKW6701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae7c41cd6f1c51c261988a24692707f85122012d5c65dfee91d65708edb43f. 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/AUUM72100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f56f8f8c76dc16b545ef31eb9e4bce4bf10dd57d58eccd7b6cb247b74c102f. 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/USUM71800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152db9e7c3924cc3f071ce25aad5f7c97da7c3877bd4abd2f04541805885645. 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/USUM71516761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fccf501da9fec97f7860a8235d646acef1a4194105c5a6556df3c82444ec40e. 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/USUM71900686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc655f0975d0e9e47ade3e7289f82a6820c0e3f33a15f979a77c758f93b79e8. 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/USUM71710315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fe3d39078d4a1534f16db78e341a64430dc797eb5bfce1e11273a2cdb9c4a5. 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/USUG12103246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c2cfc29de01079cef3f244f61ee76a4412282646288ae1cbbccacd54418ec. 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/USUM71801573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e95e147872888bb7f79a5a3d7d2e8493b3b5a8865abd8ceed6e86391e7fc1e4. 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/USUM72105934.