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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ca6795b9eda634f8700df5c40299e1aca589222e19ceacc85080dbb90abe4d. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e167088d-9d8f-46ea-9d15-ff640567b415.json and https://artists.proofprofile.net/proofs/artist/e167088d-9d8f-46ea-9d15-ff640567b415.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ff0f3c81e04c140710c038e87573c67fb2061a807dfac41431c49cfc9a5fb6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCJPY2328057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c2377a0fb70fe009619b9ecf681d1204f9b28c6f9eab8a9e7ba3add5f5576e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPY2328617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabca389ea015d77de0aaf34cc84685d5b4343871769c646f20b379c5296f86af. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCJPY2331832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28808c718bf994a83fda4b1a7a4af4dfe311a0c9d516be959da3061026ba9913. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPY2335987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa198359378b68bbe7315fd39c1317a0efde4e9d30aaff39c622d70c2ea74b902. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPY2347649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25543db95ab5120a79e9a70607216563d3f5e6b2f68fb986428384466ed6973a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPZ2453791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498b2083f7bbd457284a40aed3777feaac52c3cb2fb2f095031670ebef0d6354. 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/TCJPZ2455107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4142cb5fc6bfcb75383c776a5596065a91dcc39a4732412ff8d361dcfe58c4e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCJPZ2455110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4afe4381605612d0c18cfe1b6c60a4a0eefaf8bb56a2b7b032bcf04df2ed02. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPA2412330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256e9d3d976899c2da6d2ffbc3f5c8177bbe14fd244bba492a98caf37f588ccb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPA2434978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332fe26c20517d1a7b81d243407c5c97727b85f2c7432c3d150eaa683c0e83e8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPB2463502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e08ef5dbe8e31e842ef65092431b4bc4483fa9bed18840d3c8fc06c7a35ef. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/TCJPC2437880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b756de6cf3ea76533da64169fabc20d48121f8672a46c6e0b7c988641fe9be. 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/TCJPC2437872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5275f51b671670643f48e32166c315dccdb0a5c8ec1850a3a1a18462273c97d2. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCJPD2434527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0d227ffa7c136bc5249ffa0da5abbac7922f124a09594db54a90bd5f26c5c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCJPE2581206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb842d536ffd25ffa47169969f3103c130217480b70c8dbe35397c30f82dfd153. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPG2500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1941998f877a50783d7784f7cf0f4e0cf7f5eb526a171b4a72a844b77a5f4976. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPH2530737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428dfc06fe06fda54637e9dcb25ea517ac0c673e4b4e57b200c672399facb1d7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT66K2501041.