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 0xedf94f6b20e7c0249500c434fad4e9af175130a79e64c2cdbf6dacfd357ba5fe. 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/bc145ed8-0a9f-4f96-bb20-9bc5dd292734.json and https://artists.proofprofile.net/proofs/artist/bc145ed8-0a9f-4f96-bb20-9bc5dd292734.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 0x259e606ccaf58322e2b47efb9c3d8224f0b83858d9c377676580a275e3518264. 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/TCAEN1974651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe48feb47c1dd3477fab51aecbd01ffc4727dc4a3a08f172f401f3f66e55b3c7. 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/GBX722100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b92b29ef9a90e107a378ab081c7e4d5efb4eea3c1490f066705be4f0b252a. 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/GBX722100429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc830fb9e8e32f9bb6b128b2d9ab9ea74ddc023f81a4050581c42723bd49f41. 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/GBX722100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a849fbeee0b6a718794d3a7a132ca90e73b7f91645cd77d3fadd7ed2430cdd0. 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/GBX722100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8cf08d012102a79a7d06f8ec78bea628929342c3993d04c064d64d0348b4cc. 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/GBX722100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2091c9c7f5054e4fc8f8374870195063d92c9ec523aa72b22f8c4f3ff0bc8df. 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/UKXN21989841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404382783bc9afca1bcb24d6cbebdd519bcd5557d1ea017057716f65eb9fa68. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBX722000432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431fcd6a5837e44bd15ff894501ee47234f443fd2cc372f5f7fdd6751e7bf0ce. 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/GB2DY2000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1814391e28fd5f06b0272bd4b89accb033145ea95aeb076c23f3391b112e6d. 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/GBX722000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c70e350594498f6c00bf6d2007fb6ab7a5324708b914ac7682f309dd6527476. 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/QM4TX2092893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af4e460834818a8073ed085878b0846f1d3855148b03076d9c2a797a6e0b37. 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/QM7281961511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682fd9f2fceda5e1426cc1b0a06206670e94d44c3db910857d1055f201ac9ff1. 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/GB2GX1900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960b549df74848f7e7710afc8b2a29cc87da0f725fed21c83358af0271566d48. 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/QM6MZ1949869.