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 0xd89305e5b05ddb76485452b108c394fa37a818e4a4148368596b0c939f6617de. 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/aa39463d-4539-4c51-a9c4-6d54bf90019b.json and https://artists.proofprofile.net/proofs/artist/aa39463d-4539-4c51-a9c4-6d54bf90019b.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 0x52d1efcaa04e866c505b86e653ecaf35ca1973c949486d8b748b1d670c9632ee. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDA81872427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce605b8a359dbd93e07a1a19c7c505c3a2baea6a78d5428a3dbb7bafcdc9f8e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBKPL1831885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa733f4d3f2845f75592778a69c132fbc6f1920fae6df8e48e0773a4be34fc74a. 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/QZHNB1921575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4961e89839e84b7504b788beb8e69d7214c3eb86b39e9843ec777646574a32a8. 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/GBKPL2138875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c015cfd66314311b2d170ac637d844fde60385c9e52dfc15630f3705be33b8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:23Z), 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/GBKPL2138874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941ded3278704a01fba34ce417dc98c81924d55842ebbb45dafc5acfa20825c2. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/GBKPL2138877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68debf9335fef4a54edbac724038145d455202bd11847b3b230cb37c77e34b6c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:28Z), 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/GBKPL2138873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd069de196c3813d775b41fd9fb400b3b24144c0adf1044d11ad7eb59fadcb786. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:42Z), 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/GBKPL2138881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9240a35a8e0ecf45fb0f337258bec1f1ff0366a13ee9f315f8579d5a0fa4626a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:54Z), 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/GBKPL2138870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e92d944497ebad10def14fe53fc89738b329179df8c5675a9eb4085debdc60f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:01:09Z), 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/QZPLR2165025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aab61a8f776d5b1afb9d3f915244d90b07f373ea3b90df29938943c93c24f99. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QZDA42223723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf85566a98195cfcf87cdd3977bbd902bff51f3df90299dc44b251232f5fa2a3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZPLS2302795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28fcafafd8a5231c7fd2372be157c8b9d1c226d11ad4b70cd7e6a826f28a7a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPLS2302806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf96ba68109c6c391e51c7ed393bad8abb52ee0a001c879ffba3b2a4b702985. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2302807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6dffcd06394c250cb8f97305c7038948c8aa96d473bb3f58ab7eaa38a26186. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLS2302809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d8b0c2791fd1e55769efbcf5f903413fa3def4d7ee7f0a669d6705f7fc29d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZTB52429637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d328217a1cf6690fcab221c3de21fb2570f8aee1c91a0fa7296bb38c80570e5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7U2590476.