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 0x1e76aea817a57dee13a18b48c68ecb2ca7362d1bbc3ee2bc2868251088fe04fb. 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/632b4702-1045-4ba4-ae71-eefe0c593404.json and https://artists.proofprofile.net/proofs/artist/632b4702-1045-4ba4-ae71-eefe0c593404.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 0xf37265e607b1d9282875c6ff0c3c88562538084490e7a3d79ea8cc8017706723. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2027112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62259426a0c0f272266cd6c4cba1d4c7efedd2402493d467aae16464c26fd76. 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/QZFYW2124308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49dec3c26e09fe81931a0bdafa2eb13de9e18715128b6ce1ad10295a6546a61. 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/QZMEQ2187519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa751909ec7010768794ff59ddb3282ef20b202c6cc46706a3dcaa30af6663b87. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTAY2204215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d164b92cf52f32d3bfe6b98ca8163eebf556e11bd21b986dd1a2b91085c80. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZTAY2204216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347b58f225c170b4316a962208ffa10c42350aa9b78c7ba0209fa5ac0d98398. 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/QZDA62325901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83cc5d59dcb6773ff3da8c0df5bd45114617693af8646bd12156e00b9c10e2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA62325898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6555de3ae713f8ea62a93ce61718297a7cbabf3ab1fb6fae8f184d0fcc41fc6. 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/QZDA42490402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b2855530112d2388b0effabe270668ab802b4c1781e2e822e213a678c288e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA42490403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4d1c4bf1596bb59d291a75e2d3b23118ffea939a4765d177149349eab30e1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZDA42490405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58cd8eb320e5db59bd647b9d81a2b558221e6f60c9cc529044a38cb39719d98. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA42490413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5f8fbe096eee9c05ec5bbde9a4708516877a399dd4e026d6af8b16f4f9fca6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA42491429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf08df446ee6dd601e53cfab47e16529e85c3bd4059e49c4b33544ac836d45. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA52405747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e59b50272d8c2c62dab5d63b723826e285a3e3c0f56b6d96802d9ef2e2e0a84. 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/QZDA52465431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd6a5bed836ead3fb11ef0a9824e9e19b88bbb78659b6cb96c25b056c9f65b6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZDA42488673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6555de3ae713f8ea62a93ce61718297a7cbabf3ab1fb6fae8f184d0fcc41fc6. 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/QZDA42490402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b2855530112d2388b0effabe270668ab802b4c1781e2e822e213a678c288e. 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/QZDA42490403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4d1c4bf1596bb59d291a75e2d3b23118ffea939a4765d177149349eab30e1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA42490405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58cd8eb320e5db59bd647b9d81a2b558221e6f60c9cc529044a38cb39719d98. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA42490413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7d0ae6fe4d56215e9ea693015163711c8df9c638fdb7db986425c33364394. 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/QZDA42490423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf08df446ee6dd601e53cfab47e16529e85c3bd4059e49c4b33544ac836d45. 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/QZDA52405747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e59b50272d8c2c62dab5d63b723826e285a3e3c0f56b6d96802d9ef2e2e0a84. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52465431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384172d23545682bd3cb71d245ae636306730c43a398f2946ef06f2edec6b55. 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/QZNWU2546823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc101eb9b1aef13b6614b4c01b71950e963eaa46e634fffa2da7b85ffefcb5. 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/QZDA82142848.