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 0x396dd9c62a7afa0d699c27d8bbe67fdba72f72c7ce63e1b72048f99b3b844a10. 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/5dc2f97c-9e6f-4acf-8bcb-37a93a0bd46f.json and https://artists.proofprofile.net/proofs/artist/5dc2f97c-9e6f-4acf-8bcb-37a93a0bd46f.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 0x4e122f9def975485ebb170f61626c1e2bc8a515399de32fd3633e132d47b305f. 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/QZW9L2341688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08543a91ba50b53c7631a18824da27ae26c8e6908a8e5d653c64b4e2f10f7af4. 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/QZTVM2451322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cc44c12ec83dd0655f0125111512071b0de24132e5195fc72c0913d50ad696. 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/QZNJZ2487135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48000dd578204242802a247554a2cdca361c890823ecc88c03273400af15edc. 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/QZNJY2482517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e76006a513b12502c7ee1f48197b84fd5b328610c3d621cf593299d7f059b8a. 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/QZNJX2431697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae53aa33f80312c213c295c6ea9e336f9b554acaf3310b305a2dabc095b33c. 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/QZGLS2414991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b02a08510cdadaec89b3f3c59c78daba858ac1d94884925dc1b676acc3dd2c. 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/QZGLS2403096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc334b139e1608d309319055ebe59769e61df191d395c34ad63535c3777476774. 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/US7VG2493999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00ae3d66295834722a60fa637405142da32179892a0f524cde91cf456df7292. 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/QZW9M2331862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e7e587d52fd29949c490e923e6bfcf7178d379e978c7dbb0f5a94bf697cbb8. 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/QZNJX2346996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50155fd7a5f9f3e280791baaec9c075dc3f05a1158d44fa4a7f0a70c04a18eb. 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/QZGLS2348541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73509aeefd83794926dd8e6982ba441ad9fdc82707ee8320b66a42e93acdd74. 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/QZGLS2348542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b1e6d1d6037002ed7cef16ebfe41a0f3321e4ea77b3115443574589bd9fac9. 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/QZGLS2348543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bacef017c055b556ccbb42d9b256a666faded40040538ccebc86386eae38bc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLS2348544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e37f29eb1f850ab744a4f2c1cc53353bcd9ee8956ac55fd491d0d3f4c3bc661. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKTHN2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5b9467cbc23640f120fdb08b4c238cabd5d9c947230101d106c164260359ef. 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/BR5G12500001.