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 0x061545801348cc40debb864bb3cc208d0f99827749b19be55cb094c7b2c52f56. 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/0e4ea4a0-6250-45d8-8c9f-df61a8f96355.json and https://artists.proofprofile.net/proofs/artist/0e4ea4a0-6250-45d8-8c9f-df61a8f96355.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 0x1ed2142e5e200bd7d196cb38303ccb8e50f55b4fd530489a53517dae5924dd3f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BCLOO2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cfe85e5ece8543d027c8aa65b3c99ce730bba0c222458662976f7275dd378c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BCLOO2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c23d3aeb52400e84ce3beaa354dee41e8bbeda161a9cca946908a01758257b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BCLOO2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd52b4e0323003d2f08d5d01fe54a723f29526d5168981ce685d7b1290d543e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BCLOO2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6bdf63a2ce4c83e135da03e1b26722b1aee63670e5191902d645f7301c36e2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BCLOO2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8170f9c0389bb583ff69ae349db33c84eecbecdf60ff881bb9ad16426f9fcf50. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BCLOO2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510d3562a75894887e10261ef9b5ac263d181e7c71aaa977ecdf4a2c2f40466. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BCLOO2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86bda805f601dfc19a83d4a1b913aa3f9ca0494ab06be2d7a81e1e8c1560eb7. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BCLOO2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abed3f0bc69a5b9c7a5d9d1f9d09f5d08af039fa87d5774941f875335abd114. 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/BCLOO2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158917f26158c690d86b3873ebd5a98da663ac8719e4eb304bc0974ece4b43a. 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/BCLOO2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb565d9e72633699ef5f0f6a753776980486c6ab79b9c074438d50b2b2c24e. 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/BCLOO2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8d55e4a5f984aea2c4ccac15c89a17f5339d2781451a976992b4617e821c2. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/BCLOO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa714bb4ce28bf1b15f5d4d3a344cc6565439c916a73873e4a0b782fcb58d999f. 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/BCLOO2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d66b45155b046780b981c312afe4a626059fbac4887a8cacfec30e1f396328. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/BCLOO2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dedcd6740c2f720990735c603dabb0d3bff0317c4766bbb09631741d909a013. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BCLOO2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787743086b473a6a53c33681d48fe43806c64b32995f07c70fe77f9f2283d1b3. 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/BCLOO2500018.