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 0x9a2930417af0c9059ed71cbf33b1fb7cfb2e3b49743f11553ed0a628b545c298. 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/645d7b46-93ec-42b6-bcac-80e34e445ef9.json and https://artists.proofprofile.net/proofs/artist/645d7b46-93ec-42b6-bcac-80e34e445ef9.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 0xab4ec3d853904d029bfa48bf33cf544b9029ae62b0774aa261d80a900bad3cd9. 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/USDHM1307666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099492f676d6f626209bb903926f27cccacd8ccf4203fcdae4412fc9bfb83bb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USDHM1307671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e27c20a9bc75ad8ca04c91a337e13d58614d1efed38e80bbbdd76a2a2fb249. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USDHM1307675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89d9bfe70ae0cf4988a5f061180136a7bb23a256dc0bbdc659d85e71ccd805. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USDHM1307667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6116415e52ee9788979107cef152c21fa427c7e1788c7b2953cf401ce561b777. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USDHM1307668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e41928378f57d569b1eb9e42120ad86c0fd0dfbcf3f5461b6675c9f0c85b5bd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USDHM1307669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8571ab87dc54796f96ba2324b4fd2e75126c9eb483aa2ca9fa09ee2a741ba2ed. 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/USDHM1307670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c911ba5253c39ebcdcad0bacb713d1781669bbb7d1c4e0bb2783a547b61f5da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDHM1307672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ecf7ce65b6c088fa9a64a0c7e94422f104886e742343f4a14be0314b997116. 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/USDHM1307677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eac0a9fb3074ddd24ea68e39ccb37b2589dc27fe96a20a12bc7715a2965244. 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/USDHM1307678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7d3f1c4abe46522b16a94e846dca5b5c4ca06020efd3bd3732c5ec30e9da7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USDHM1307679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff953c47eb99b9677b667986123ce3767dfe9f67d3db456e16386ee4e15e2c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USDHM1307681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec293a8ca6c485cb9203b323deb955f47753502830fcaa1945dba0b7bc469e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCACN1603458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c08792e0b6aa88ac97e710b5a1e81cf32b8d395789ddd2bf8ac0f05aa4594f. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/USDHM1617900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2505ed40f0b34e54286be914bd5db5b7dc49b337cebee962a7df67f5c66d386. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMFMG1560271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a13d0d3269da6a0ee0581ce0871623270c1f96bfc7288c4b6a03c854d7c19b5. 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/QMFMG1560272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e39401d1f6ef292283a852206956ec6df5def281176982e13ab771876910c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QMFMG1560273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596775d73b2dfee5588fb49477e60de2b320084dc5cba11d0d8de37f55b3160b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMG1560276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95df027bb55dc30b1534da5f29c8d5bc5ef0f2a9602fa475b25a0680e77909. 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/QMFMG1560277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e62b882636970ecb2d21724ebf559ae15eede4bafbea5a0bf266c1187148766. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QMFMG1560278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104366cf4b6d9fbfd5c23533bd765553cd263b50f146622f6aa0c09c6b6758f7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6N21756601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca035c977212e0bc1326852bdaded6c7d51b2a09630b92c0e93ed48be8680a0. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QM6N21756603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f541a509acb9e1f0bacded29bcc4c6b81f2bbf5f2b0a8a249def34967b1f878. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USCGH2042242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56399a7dad72175f1bb31bfa6cefb129c7ebfb35c803708b1e3a83dad616db0. 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/USANG2040820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d50b7c63b58677a6821761da767e9078f88f389fe9e1e8fed9bc028626c003. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM22034764.