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 0xd018672877314754f2347eebe323292fd267ee336007a0c16e7e5c2a358937a7. 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/7e015f02-0d80-41d7-93f1-3c3a1eee5477.json and https://artists.proofprofile.net/proofs/artist/7e015f02-0d80-41d7-93f1-3c3a1eee5477.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 0x5ea5c5499f8e6b91ff8d5766012626cb6d9873af7589d4265e3339d0e021a7d4. 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/RUA1H2472189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8555428ebe54cb851e4addf29e26c78e500f866375f8cdf4316e206fb54011. 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/RUA1H2471488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ee78c5da9d1eb466e10de44aa4c8f630bf15a74033e4b73143a77f42d1e721. 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/AEA0Q2383520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e65403451ca8100da599d2364a46f5b65094d5de4f6eec31261f69c3456391. 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/AEA2M2343841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca6d19e4eb2637790a3f3655ceb1bbe544750c3efde8c6feeb065a0f398593. 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/RUA1H2383000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dddf755d24343ae653b7bc28eed61bafdd4da00d0b8da58664291f3766c384. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AEA2M2170446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0519cd99e002e9c3ff9ca7398aa5f874a847d9228626d2021a41b0e817894. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/AEA2M2170447.
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 0x9eec77e04cace97e56121796c8975e0a0212404b48c823f80aa19c28a8feaec5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/AEA2M2170448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb862a5a8261007d08ed8d1dc21e226bc563fdf07e2aa0f2ef9980068da0fb4. 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/AEA0D2216337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc880b8f082a39aeb21915756282c75e688a24a8866a360f11771c3a490d6dec1. 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/AEA2M2239409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8ffc2d77bff719f5b43d5228031df0d4cfcdc0a1561297189d6e096fb64f5. 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/RUA1H2212258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497cae56fcec8b910396d97321084ecaad404810a4a834d68001fd8c432d7e0. 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/RUA1H1888621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dadb7e9f91befa8e04631e69274d861544fd96452db6ee357379f7d07ee91f3. 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/RUA1H1888622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b9ecbad71e0e5a0a9fd47c68afedd127854d7a8f74a4c1192ed7a5ff6cfe4a. 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/AEA0D2068994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bfcb693658a5a7d7d17e6d81005856a1892949b6fe7112764735489538a807. 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/AEA0D2068995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65843d06988a022b6167003b0a02ed9305f4cd841a94c9d8c1a3710ba5675a1. 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/AEA0D2068996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c2d715389fbfd0afc93383c738d42dff1cf5bee5ad078d75bd1be78ef03e8. 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/AEA0D2062623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49867f742220a8b4cd37603bd4fac97294b06a0dc3d66d9976c315de8a53cd. 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/AEA0D2055071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdf73f117841d207fe6130064243a65b7d85da224677f98b3fa2869ec79414. 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/AEA0D2056818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ff064f82280bac5f60d2d0bf729047cbf2f571613aad9a5841e4f6f07f40e. 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/AEA0D2047040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de8257e69fc1864ddbd4172538db6c2497e26b93a71b5cc9e95035a851f2bf. 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/AEA0D2060142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc7dad0efa003b31c26ba6d7a269610b7f469441a4204b9a402222f3f8817ed. 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/AEA0D2060143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e21c4fc38c565a17acec7a67f7a5d34cde2ebbb95639d3ba633e189e685721d. 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/AEA0D2060144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35469d2ffc24bb6ed20134ed1f5ea73eb8b57731f2f0e459d4bf2a52b7715955. 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/AEA0D2060145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8ff6ea2732591eb2f61f3486ed19b503f8bfc0e6e614fa7516115a58740214. 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/AEA0D2037808.