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 0xb357f703bec1228886f5b813aa983254652369c6f88f81782801a2512dc05f51. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17c51183-81a8-4c50-852b-366f7c4811f8.json and https://artists.proofprofile.net/proofs/artist/17c51183-81a8-4c50-852b-366f7c4811f8.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 0x37c6a70ccfd97da9a7bba6f584aabe9db792d5ea7301fc3898b878c07a2ee1ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR1600900411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928377da1868af592fde47d3b85ca0a019441c8fa0ffdcd10a6005c6487758ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR1600900416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e921caea9316ddd01981213e141d9aa45baeef133b62521413ad1e7dcb05d9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR1600900883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b45af651d02bcad69ae0fca6897db744e6eb0c61823aa8b16e8e2fc274083. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TR1600900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67384051a5f86ca652fbece3e534ffe6a2a5dcbecd6216db993799c0ce9a0d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR1600900887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e11970c170dae9d228bcbb120f67bf3af6e1d43768cbb0b970295bb5c1413. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBSMU3580721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc131f6e1a640b7f502dbb0bb7e0bd14f6be8d404987566af2933ca0f955b1a49. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:31:57Z), 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/GBSMU3494138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be727f73c37bd7aa37ef0e941e9b1ceb6589fb72c96418a141eaa483ce1d29b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:52Z), 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/GBSMU3494141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5391c7cf4e1820c53425b592791d89b1be0fcd0f0fb77d1b18f9fce4a7ca3d4. 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/GBSMU3494144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd421b3ef9227d8d262456258b1246960f1cf02e9157cdfb3f2e6850c25f5f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBSMU3559443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850fa343170f268375b62cff51005b9e9e3bc2827e04266251945c581905b95. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:17Z), 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/GBSMU3559444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf3aa52baddb394dd0dd8b17f4af5668c0f46ebdf854ece84f6c784593b36f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU3559446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa803ac81c44b47a8b1318335f1c722fe2b02b5489f4a1be0346d86d6c7fd9667. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU3559450.