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 0x7e81ae8bb4c749a0445e3b0fd86d6c6f54faf07d4a712bd9fd35e9822fb10435. 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/825e045b-5364-421c-a364-90d2077ebdc9.json and https://artists.proofprofile.net/proofs/artist/825e045b-5364-421c-a364-90d2077ebdc9.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 0x9c4a75d7196b56158e87e3872fbbb3af4f712dd36b37519c718ff0cfabfa10f6. 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/BCSG12200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190000c13751316c8f459da3d8069885e856cc8ccc230f9087298763613f562. 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/BCVHO2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f6af64b46db6b6620d00d48ccb6303a08cc6088927d531b13398a66312490. 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/BX3LT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8726c122272494aa53d7e8d050625b3a35f988a782d2ba1c8a9cc7c09e63513. 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/BCDMP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382fe56a828a224b777e47e3f3200806bd0fa40ea7102bc773c8311b9fee8b43. 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/BKTL02300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3b9931f107959925e46031d7773b79e44dd3d379f0fa727f3e700edd16258. 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/BXNT62202909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b9a8b623d2989e05171cb2c623ca38547a76126977f733c4d63985e34cfff9. 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/BKTL02400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a12b586b4df32497f551604a422d8f4e0fd0a41e83259f2460dd61ec97779b. 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/BXP0K2300876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b02b0ee97b6f27dd702473efa0bb549f0e7dfbbf4267b5e900752697c6a20. 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/QZTVM2495504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2643b16cab06d58c135aa8fb9d16236c707496eb47d8f931020e57dd088145. 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/BC3PG2402068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d562e48b53d4ec6fe7046a54d42b9c1719a937e61e26295dc0e84b11dee723. 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/BXIV82456543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779adbd3270196624704e0646d6e0a939154300cbffcec3c1a0be6f93296ca8. 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/BC6M22505482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda784ab8accc2ac07d56de6e94eb5268cdb5086037a3dc7ab2eed6fc6ae6db. 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/BXUWJ2400015.