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 0xe5b0366807ff805e94dff83ff5eb1d7e5f61fa4e78f4c8aca406ed011451f4b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a93c7f25-5344-4c0d-b752-babe74d27915.json and https://artists.proofprofile.net/proofs/artist/a93c7f25-5344-4c0d-b752-babe74d27915.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 0x0621cae293a0801555eede1522dca66b646888f5b17db920eba22a0e958d4d29. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB82343220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc2ea720389a6ae7a91ec075efdc2d9efe8f477a6c3387acc1fe59e51b38f8. 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/QZTB82343221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747a0f8d500522ddb04d6ef4a34b515471e8ede4486887d885e4225cf821865. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB82343222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e90cdbf0a56280e9b19a3ba1e897c91e1efe4e9f80acfea5deabaea6333507. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB82343223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcff094c384ee1636439dccab744905e4cab7432717b1ecd7fa537ae1dbb9c3. 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/QZP7F2473615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ceac5bb37c7f386cdd42b5dd93e00534e28b780d60559c060ea2ae1ef1683e. 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/QZP7F2473617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dee5cc01db226d17845dc52a740e1d245e61dba42ae979392fe7cb05351a534. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:20:04Z), 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/QZP7F2473616.
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 0xde760fd0ce1f866d5af8418e0aa887165fd41dd418d4ee2532f4ad6e3300200a. 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/QZP7F2424973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4bed81e4c447c4d4295f509b78c4d54c96ba5a980991ecb1a85383e6c5391f. 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/QZP7F2421712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a96a80bb7951ccf33307e94d9351235d6991d148fe688ed568319666584a72. 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/QZP7F2421874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77a0fd5a2969259c670d63dda9f0d34ac195b13f1ccf2b621c25dd116801d62. 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/QZP7F2421875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c6966c6aad8dd872ded683967d327867bb21855536a8000dedcde457491e4d. 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/QZP7F2421876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089e57160d66566230e1f3ecc10749d53b6471dc34fd4f17c71ad8a705c8d2c. 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/QZP7F2421877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5a81e054a27c1e1afd91fee1f77d1194ec126038f11aab1aa9bfb67389a073. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZP7F2421878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c2ae524ead9793f6dec4cdc415a95e7072419027151d88edc52bbd46ef846. 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/QZP7F2411886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efd5e56679adb09642e7d7d05ee41cca670fb239e402c4e832ce51490cf1729. 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/QZP7F2404722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67c8492ad81e1dd4068f3f37ed0ade6dd6ef5e7787633266f784e7eb584bb7. 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/CBC6H2024268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d542f2f9280e6ee05a8c54b00306b9a7dca4da2c0d1f3a9f5962679f4f8ad4f. 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/QZNMX2430450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd9544f2a5b21bd68737f5339a4590189af1861dd9c55c5fb2b24ba96cd2ed7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2411481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff89e8873a9a3701c2acd4abd48342bb9701b0600ee86ad587c991ec98fd950. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2471312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e05414a67760d587b364ccacf270b181c8caa38d99e1b8a7928484687d3d44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYY2412249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944d77e4e4ac853806742b7aebc439a04acc8b30a98b8b2d3b38530f94993dc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWS2471313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac94366d9a1fc1c669d5876fbdd856fc30237818908a0eaca79a8b32bfe485. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWS2471311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86a653b0010de426c2da66879a8e543034bc1f31d658c58c9c3c6174440f0bd. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZNWQ2402435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215dde3a98a69c4875dda85ea1ae2c90e550dbfeb15b53211f8013464b6cc631. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZP7F2324164.