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 0x5e92d917b0b185c08b500915926f1e530135204572a2f49cdb75ee9be21ebd21. 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/eef03380-a1e2-4f52-83e3-0c4a67d29558.json and https://artists.proofprofile.net/proofs/artist/eef03380-a1e2-4f52-83e3-0c4a67d29558.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 0x0047e516d920c5e0e6281d3115875d024b352a6c859dfe730c9da02e2651e8b6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYW2020792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d3ad8d630bb84243b1341a93c7c65a8d340f4a2b199efe0d464600f4dfb111. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFYZ2039789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79e5cd57161f2ef6d0fcd065e1d3cd2309f11ba8ede08a15508b7241b62494d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42082449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723cf8565227b8c0bd8a39badf5c87e6e1af2a24401d96e2fdfd15e48aa07229. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:54Z), 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/QZHN62002341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e47d88d7140441ed0d14ed03ba8f45a8977ab25b673f5af8682767b4ebb09. 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/QZNWQ2013468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d3d12822fef448627c1f714766c03e98309a88099bf0e10cd6e7334b45af96. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6P2161579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec750c9a87207b5a8e50011eac827361f3b8362f02dc7fc7287c027dd47fe1e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UKZGC2203241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc09990fbdff252dcfa99900faaabf14c3f9495b8cff07eac256c602ee05433. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UKZGC2203811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9abc009b1c3910b1ac5a9332977b7136957119d2a3e9284caf22d5eec6f014. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZN882222086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4c734ad7971324f0efcdc2fa93060a33faac74bff1871cc877ec19115fb5c1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZN882223879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b574753fb678b606792baee0e23c91624cd7371d6c34cb520c17bb7a44dd1. 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/QZHN82176597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee284f300a9ab3bcf5ba9b31a0c5b2103016fad8a422890102dad9fa3e965ef9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKZGC2304236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375df836b0c31aab9f2ebc3e7be7bf1c6f2429159fabfb7a8c22b69f45835704. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:22Z), 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/UKZGC2501441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21778c69703ef4a9bef03cd28213867beaadd3c629e0c168084dd4d604121aa5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2503562.