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 0x0c211362f44ff8c12b6247473a94377a7d12a44a0781aa79c3b910fdad63952f. 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/37d3008d-f5c4-4824-ad1f-18bed33671f5.json and https://artists.proofprofile.net/proofs/artist/37d3008d-f5c4-4824-ad1f-18bed33671f5.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 0x04dc1866848351b4afc90edbdf9b5028de1186ccf6354b9272550be29c05eaad. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZES52276250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0aa394b4bb107956d95929ee54f45a2198106cab86c137298bde14036eed46. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZDA82271430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e251ca66f0208b2c12d87d3c25e67cf001b3d03ac18486839e9ea10f51b5a02. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB42295673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711beac2c1257eed0dcdd688b56af3489d9522b02e45a4bda9e50374a79e1310. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52051837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8040557633510660274eea49f1dc80b1b1f6947f7802a05bfd9969e033c1f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62121572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aaea9b9934558a02ff47b1bd7a032d11ab15925d99ba05201287a5f36c459e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFJ2430019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24db77a34e25ccfc54387490770d4dbde001830e8581d74838a5e72eff4c80f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFV2484257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd886979590acb1f679d155dd9051dd6eab9a121ac7588baa2642efee52db4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFV2484271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ce7407abe28b2bbbdd9b7e764c77cda28588e3933a271405fd3283f648aa69. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZZ782434237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578ba953d98c0c073efcf3dfe6807caaf860e2ffb86bc8a4609142d4f784f0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ792468096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd28cc22a26bc1ec92dbc0244a600eda446f05b2cc9749912b9a3d2ce19e6f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ7M2457616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc982cda5e7320e396f10e3a10729adf43b705218f91efa0ea8b95927bd779927. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7P2428794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca863589f104f993ae1a5431e9a620825c83bad8154c50840245741d64bfd9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42575789.