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 0x8658292428c7909d9f9d05eed03d1cc755e9d1d3c0c9a8d097b7bf61d1e78252. 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/adf5ee84-050c-4e52-ac26-5d2ada87ce12.json and https://artists.proofprofile.net/proofs/artist/adf5ee84-050c-4e52-ac26-5d2ada87ce12.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 0x193efe7c8c3faf10e459bac644eba00fcc03269aa84b540790fcd1ab48b1d215. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:10:02Z), 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/QZNWT2329173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a11ca69b14ba5091cafbb77e806a9c662d9eb6dc8ed30ee78df7ee7e4baffc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFQ2345975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023dbe342d6970f1ea82eb550c3ef55863ec348c0abac20b909b6ec922a70982. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFQ2345978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a24d90d8480027990692be7dbcca380a574949ee2540b861b33191b351b669. 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/QZWFQ2345979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371eb099e7a6d023ab39a22dab777a24de40d6500da0e5186cec2569364af404. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZWFQ2345981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43ccd07391791fc2b831b6bc8c7f36f7921f03571f314637685f5377e02cee5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFQ2345983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa368df6f0a53aa4c2f0306e626519153b59e7a321d51a166554ce9e793299451. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:56Z), 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/QZNWX2416412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1575358c2f1e9bfd39840ce26c0ee8e42e094fc7785bf9e32dfe3cb3cb0fb5ab. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWS2423861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2acd2151974bb623ee15db662de990bef4fa870720619b747fbf27e637a563. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWX2416414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77055911a64fcc77228c6ec72a3e9cba34f6f52f3933428c25716bbd65f0d53. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWX2416416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c916b491c2777dd3ca843493d47ca1776390308e8231294d5b7a7dbf4caee88. 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/QZQAY2466340.