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 0x48ccd40ee9bd18d0a31b631cb06ed10de901fad4aac23cbb0cbf9c1f33ff1b5c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8243465-6e15-4064-bdc8-84f90fc59285.json and https://artists.proofprofile.net/proofs/artist/c8243465-6e15-4064-bdc8-84f90fc59285.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 0x7602a06b90d09407e65fd855085c4e6d83d8699aaff26213befee1d10eff0a1f. 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/HKG732294041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8fd1074fdcc4ecd7a3a23bfe398a991393e82d645783937ceebcd45906ae9. 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/HKG731610441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42176f927b936e391cb0b85e84d3d8a67fad63c70e222cb5789b3ec974b7988d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732466752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf449d0a00e77c3141e5ef2a0671ea7f6ab96e9dc5a4121600b69c384defe371. 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/HKG732462762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5617fb2c1bf761243732af51cf9893ecf6916724aa1a456af5ec7a99b873f4ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ632400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c19d56677190be417fbb8366eb3324be7e8c7b15e6be07a30d67c1eab8d099. 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/HKG731678473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d651ff13b608642d7be9d2dbce499b980fd1ec4df06f466f49b62a9c26d55d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HKG731678530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce98810d1fd297a3304cc04d3ea6ab45db4c7d6b4686d4ed0ad165a5391a53. 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/HKG731654952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0a9a6a16f73d5fd0be85f78eada09b730c5b1e309c3830042c3fa1c7e210a3. 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/HKA412300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc52e1c74886cc2f8ed1df0fbc5684d13130f1093a8ce3ec143a9e90debbc3e. 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/HKG732381666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc9a45745aba15939ddfa49d498ebb79b0a73772fcf767b350ed2f4f6a3905. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732377007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ca3212b201fe1e3fc1e8116602dd5d1537f12f93b4d306828f4b3e48c949f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731610442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319409bcb3ae4fad107b0dc9a1f2cb6695001f4d5f65ddb5cfdb09f59a23c579. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX872396538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283de494bb4ba50c3c7a246db5a4f9302c4e70c26703f7c7de66d706e03174ae. 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/HKG732352274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88e69d7b02dd715c781b62877d44cd1d99765ae3638947eb145ea293df3a5e7. 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/FRX872335372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945e4e196ba5b4eb1c8d2e386b8d8484b46524abf9c30eecaba093dfc0aa4c3b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732349694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01ea790d0ec22a7577000319dd1e8d67e53daa46599d6c5c671b8c084f4eb7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX762343794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d6b363c664141903a46ebba3afdef07b5faa5999acea90f990cc2d08b2f0ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732311817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40420778f719120cbdd6545a1867ed0d9c48a10ae5fdfcf624613109eac2a5. 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/HKG731600155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf100c5a16edcff337554dc50b5ae3a50c98df2a4c2b4886d0d83bc5f39952b85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ632201492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ec82ca6fa5e9bd44ca02a76265f3b523e93361d5450aed187bf0840dbe737. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732312480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee55c6e95d75578c97340559dd4ed453405bed66cdc64546696dbaf381a49e. 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/DGA072206242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c403088d88e45caa26c60282d3f487f2f0a5d047330df9b3b09b20adc0ea218. 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/HKG731600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c7a70befbd681d89a21ef48e887b2c52abe027e88db3924ee802cd98a5bb98. 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/HKG732311576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10dbc9879d3c5e0463176d50cc304256947bea32a3de4c5705fe7b127c8ba50. 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/HKG731600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6374cbca161127c2994b2f79465c80f47e15ff0a23dda5dae8088bd1501f748. 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/HKG732267732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc39a1bf32f9d8def5a9dccc0ae43a212ff381dee57372e92aaeaca85bc9d9e. 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/MYPM12200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b77201b5317b8b2beaf2f15cd6fa59e6fbc6e8867c80a47847582737119e1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452253531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a71dd302ec276cee8c02ccc3c8fc785df01c9baf7c8835b57314946420b4893. 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/FRX872376324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe667b6d34b3749464e0045792e64f278caefdb1f5ec22964f5669f649800f26b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732255995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc7a9dad5dc1013dae833d18a8993a8167bdc9776d5f6765a6c755d8a9e4a3. 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/HKG732238125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3af77df6da976a3739b33c1e6d8fd4595b1d91789b04b59a9496a3c9ad3229. 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/HKG731406413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2968ad02b213b3b4f5603ff14fe43a358357950ffc6f514dbddd4606d371fd. 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/HKG731404756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a754b906b1646cebe56b1fd19422364ebb6dd5c5b9b3fd120605911d9360d. 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/DGA0T2443170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4fed7c47a5d475fbbd549cdeec9eef811ec7301216dbfb423365a4d93cc759. 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/HKG732489819.