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 0x0fef13019012eb2955bfd6673b41f20c8aafa17d689e146ca4f9c255d208c51b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/857b3aea-2d8d-4ce7-a486-575b60e60303.json and https://artists.proofprofile.net/proofs/artist/857b3aea-2d8d-4ce7-a486-575b60e60303.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 0x61e11068954b2d748bdb3b391865dfa9d4d80f10682d363ba40debd3e6841d74. 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/QMBZ92106111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e309d619f0b88e392e7c622bdf0f294398ebdc05bb0536bef52807ab5279dd8. 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/QMBZ92106152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb707fad766ebbf1fece55ff6b838cf7695578bc4d2c96f7559b73e3c7bc24f4. 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/QMBZ92106199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156838587993e2935b0e0ac0057b0dd9bec660c2b2a72c8f66fd95b9fe74aee. 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/QMBZ92106254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453f3c4c65cbccf8793659584930b7126b4788788a1d4904a21d36977745ed41. 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/QMBZ92106260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64444b8bf91d87475b62b808d24c4471a45bb3863c51595303b08522b5e5ca6e. 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/QMBZ92106273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b3e407c46ea6dade4bbeddf3b0e9c15967af5359fe8b28c737cd671a730f4a. 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/QMBZ92106122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67490799044faf68efa921f4a47a2bcbad3cce470e250e5024d395ee25837661. 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/QMBZ92106291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f3da48b1157993f824c88391a3862ba306684ebe9dab04b74644e6c85c2782. 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/QMBZ92106296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d528cc6618f509bb3dd3d78b262f8bc313c4c7f228f633e3460c2fb8888411. 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/QMBZ92106305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb62f69a7dd1ddec366cbff0a5f95d2642fcbb03611523bfea3d527279bf4a1. 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/USDXS2103672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcdee9dbf174e4adef8a9886a875e7f97e2fd16113b9b20231d9c6546fb0ef0. 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/USDXS2201235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40b8ea87debf574f14ab47da35027adcd10f1402c62f17bf0b2079dd7d608a. 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/USDXS2013446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f9fb1b7a0c47e7abda493741acedfa051c8ea3fa3842462dda6c365affbe7. 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/USDXS2013442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f639f9cf2bca034fb642398e4511e9d25b2953c82a7bf2eb7c6d690faf0761. 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/USDXS2013443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015340fe9b67012d225281ee1de76474fe16c3000936902b1d90a224066c57a. 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/USDXS2013444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e384615d3dc89fbf357fc195d982d422e40a7d73365c84316b3f65e7aedf3f6. 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/USDXS2013445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70a7edf1d326cced8eafe562e4f8b75e898cfa16009d2be45afc063decbf71a. 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/TCAEU2063502.