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 0x389ddfb45507285f8b607d874089b833743a5b13044a3668315cd5064cfe6d62. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d8e3007-c3e2-448d-9e9a-e1cbe1276d15.json and https://artists.proofprofile.net/proofs/artist/5d8e3007-c3e2-448d-9e9a-e1cbe1276d15.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 0x17b925f63307ded2188c5a52e4ed84f1d7e983e7c40a0fd16bb900a9d01eab51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742326441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0549250c4899168e144c2f2b67529003a1292e306955a13a392645a4de9a70. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/DEY472371378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326c5502ca5a4c7b7a884a9354e7bc4320ab722ff75d5fa469c5072774d9e5a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEY472371381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5b1ec4da7fde9a9a33e1a3683c6672b95a9b01ac89143877fe90d57ee34ae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEY472371382.
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 0x5bc93cf1556af298f0a30b7694b8357f95bce75a714101ba0dd0b2643a0c4d63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEH742218358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc46c359162bfc25b89af399edba82f12fbc28c7ec4933a7fa8ca5f61d8231. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH742218355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b70e22629a4d2ff9d47bb61e248771b5b02221e71643d94e4c964314bf4e6cd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEH742218356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783c16b7cd1bf1e62c0f3f44bbd9e864a7d56edd187fa3daac07444d1f571d1. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DEH742218357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74bbeda9cd6cf77246705eef7cf1bb85e361629f4364a7a672ee7dd4024cefe. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEH742218359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eb35241527cde93f55508c09a2aa50aa1e2501b8b834aee8725cf274c4bfb7. 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/ES71G2246468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44da549463f6629725cbe655511e77256aa61653863aa22fc5d1a1e43f38fb2a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N22235102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bad9f8d7c0ed81ed89698b222779af0cf39935a31c6b2c033d5a2dd779031d9. 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/QM6N22235103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ffe752bf4b4bc3a436251d6eff478a8afeb568b097b768ba1d9de1e26386bb. 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/QM6N22235104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6aa8fa47462e90ac9be8d6bb78773d6d9345d0256273e3df3c57407add403. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N22235138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24929cad90ca29be9ece3f9925aeb8d8a39efcbb768e58531485591d97d45abe. 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/QM6N22235107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ce454a2eb5ee58c5b42709748f931569510691b0a6b0e61737a23b93ad9bfe. 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/QM6N22235108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ba2f5fc07299f36584d23b83fcdb93139e8e6a7ce3e94ef5a0f073cd00e10. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM6N22235109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b720ae30e9b7a6ed50dd47462d1f3b6f878462a4cd8a00e29a020f829ca05b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAE082203220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404121baaea48eccdfb5815499b691675c89c56ff6252fcc5cdb18e20f12cc4. 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/ZAE082203223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8db728f647823263fa42ed13974b927bec0d321eefeffb86afb3a358e57c449. 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/ZAE082203225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a0a541d894cecce4346632ae71eff8b6f683d014070cec863c08b97463f987. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ZAE082203226.