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 0x6181ca66327201e6ec46bb6a0135d6eb63f6446919217e6643d077904226cdad. 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/e76ec207-efbd-4bb6-8e1c-7c29627d1b27.json and https://artists.proofprofile.net/proofs/artist/e76ec207-efbd-4bb6-8e1c-7c29627d1b27.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 0xb25f6bc60208ae5a9d6fe338f3e16bfd873359f18c0836a5d0fc2474d0f3f329. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMEZE1700393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0746bef2afb217eed21d804a82e8b659b3565fc74a62c743c57e25e729320a24. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZES62153621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45588eecebbbbf4c0853cf8dc8505f355292658e60ea988a1eb997cd848b31c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62153622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb2ea640feb301241eae8ec0746085c4f8e8df0dd8ed8a49fb63588c591def. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES62153624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfade7b20d13567922825146dec13e493381ba768bcd59e564efb36d8df8d52. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZES62153625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d4123d0a05eff5efa6184e4ef1a97fa935c297998dedb6c1330bbf04a8905. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZES62153626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eae30b02c48fe1ff7bee0c5a90b22c71cc695358cefd531f0b0cef395b206d. 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/QZES62153627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633b73e378a081e045d583a6f0effbd3f936b90d9f0a42a0c59fb5d7b66bf77d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32008199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc9b5107381096c2c8e5ffcf93b8bb2c13958e4d897691859d270d143d8721. 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/QZFZ32008200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ea0262f933b146d43480242f7c944408242dc21c7c3448e309860af6bcd0b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFZ32008204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0702d64c78f02d7b2d63ed923cb2e745646f817af7d42c2343e22971cbcfe4c1. 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/QZFZ32008205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6380e8ac163a607ae7883a8d64e4e572ae0d64e90ff5669fce7b8169014a58d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22088710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a521f5bec27e0b2a683068bf7f0d13391d907db31f61b8f4b1f7c362e64c2c3. 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/QZFZ22088711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854659eac2498682b3fc79d3426945d82a953c75cb53de8a988111bbfd312673. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ22088712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e2144accc617cba5cb5c632a46930f41cc89aff8a099021f4a6d85df71c0b7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ22088714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52422b2c40ab31dc67fad30ef00c899e74e053ff743f68cbd69d1ec7a1d77e87. 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/QZFZ22088715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabf50a218e887962258f0286099827af201911960d50a558c66100d42807540. 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/QZFZ22088716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f3e484689d13b5f24a17c8329835d90d37a6128be706c3716cd54965d1aadd. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZFZ22088717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42520f71abdd8c70d154ee613d85f29c831964a743c932e6e3befb8bc7b0c647. 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/QZFZ22088718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2785c580f7778b7a2e1f0bbd765da624ec5f13a30c3359db351e245e2b4e306. 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/QZFZ22088719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb34f0952dd1346d612f87fd6a9385694741ab47bb81c5c97ce2f3a837c3d80e. 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/QZFZ22088720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c4d998ed2efb05119b3cb50070bc754fb4562fa145a7f44b1e9fdb385eac5. 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/QZFZ42067442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cefe064336e4372abf04cd175868abf8f4efa13504d3d9c815aa239929301d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42067444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df936a508035a9b9ed7e3fac3be9520c2d4519a44d02db84577ce8d6b070e3. 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/QZFZ42067445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e177acec0d715f80a250a3ccdeb5e0942c6f575b928c02fff07a13d2affb489. 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/QZFZ42067446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650d1c65ddd11d1cf570b59b7ac58cb81ffb4c518b39061520d86d7c782960d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ42067449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbf59cfdfbeade16e20a41bcdd9b1523c85dd9afe42cd5d8f0d6318ba981e9c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFZ42067450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d05152fad789e4a2f1210d574addf955c3f6e96c8b95035682967a4bc993d. 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/QZFZ42067451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3374ab4e1708c11d6b840040a7ad4ec2743d015e30e23deab5113a9bff30c9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZFZ42067453.