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 0xfa57b97ee71b8f9528be8a198637e164d9c11db658709afbb88d71c92d0d4c14. 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/e8c9461f-670c-48f7-9683-18cb29cdaf4e.json and https://artists.proofprofile.net/proofs/artist/e8c9461f-670c-48f7-9683-18cb29cdaf4e.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 0xf5db533a63ab1f97e314db11604adc4b0742fc872a182becae84ce22e34824b0. 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/PL40H2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dcedc9116f6919ff88c6f4bd1c72978e03dbcb8cb412818da721785e9d12ca. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/PL40H2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef7fb546e6e4920d7f526ae0893e428739e82896a2a856532a1433dccd1d4a3. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PL40H2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292466dfeb1c86cd2609933a2af5a365852b23924eac70fe3da91f7a8dc754c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PL40H2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe88c702f96347fbe5b8a2f6a723d4f9777ac3c7fd0ce435bf70f0282d634080. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PL40H2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ba8a9860e6452860907e70a005afbb7fd2738b754c3fbf7cc63b303573e32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PL40H2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d6363eea67aeae545a8f2662fc64c44b6e62313d450fc8af07c909a24a716e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/PL40H2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e23d088ff8d32ef1364d0b2be9412a871ba0b5589220d7e71c2cc3fa09ac86. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/PL40H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204c2f62edc7d4d5284b932efa2ced8ff2a526fdf4eb85427b91c154ff64aa3. 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/PL40H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf4661ce72bfc2037d5732dfdf89f58cd3009a3647fff602e1ce4842f08e916. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PL40H2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e23d088ff8d32ef1364d0b2be9412a871ba0b5589220d7e71c2cc3fa09ac86. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PL40H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae9ba761b1a6627e3795f48d1d73a2d2e9db715f908756669092ab08602691. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PL40H2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1cbc3c3329af5f6205d6f93b91dd73ebe897735636daa1b9510667c58cd1e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:32:39Z), 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/PL40H2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05261b1bb45012f777cf8ba10dca1d0f1038b928b35e494ae1407315b172752f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PL40H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9e25e04058926c0ad1a338174d87069a662b6b7cf070c140d4b8da51bc4d9. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:02:09Z), 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/PL40H2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86658a46c7dc2a13511f157538f4d518d677037500e7e80a7111bfbb47978252. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PL40H2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204c2f62edc7d4d5284b932efa2ced8ff2a526fdf4eb85427b91c154ff64aa3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PL40H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4866433c032e67122b341bd2b9bd9e6fef3c6a593d82112d8c602d473f8661c3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:26Z), 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/PL40H2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfad1df994838a453a3789d5be9840e7756feb3459f00ffc92615822d5c7ab5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PL40H2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c631c855ed20fe7d91a8feb601a3def496fcfb1c9752507da322e967567525. 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/PL40H2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950789b159d8b84840589eb6ae0ac5f4a6087112a6eed63f57ea537a8939530. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:06Z), 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/PL40H2500014.