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 0xc833606a0e90d026e48934fd735b808189d338668bab3df761254fe6db6bdc18. 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/76000217-2de6-43d9-bb60-e9d354b9b5f7.json and https://artists.proofprofile.net/proofs/artist/76000217-2de6-43d9-bb60-e9d354b9b5f7.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 0xee42f932f15b797f415706392f0391ae9ce70fd110c8749e6537c7b4b61557c5. 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/QM4TX2591574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e0a4bf2631862b13f97a6aee18682d26edd2c37bed0e071886229af9f1a199. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM4TX2591575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f667820aee589f73a0e2c339f12313f7a19305fd23931fa71c84c6ed147832. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM4TX2591578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7e92b24407b89884381e4d842bb8382223a401f97bc76216d76d461d043959. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM4TX2591584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f9727198d55477fb5325b8d5dec3e486732f11144dd45bcc962ed9e2a4cfd7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM4TX2591587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d02fe1757ff362aa7f7ab0537c5e87c9670563de602a2203509994395f738. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM4TX2591592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3c57f69dae2ef2994e66fd6a1c288b1475c5a643c15c40885ee4e2a50d791. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TX2591593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cf4fa3b9863bd0a3497774316a4888c658ae9df4143087f0ab87ac30064c43. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM4TX2591596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ebecdd8446128fd083cc433f79a8aae9b94e62ad217075a9d7fe15b8c5baef. 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/DEVU52365021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407f3a8a44269a790882ff871a5f1e2a8975e833e2318ac7a794a0b1da757b9b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEVU52365023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8311f43c8678604499f1b09d717c67c91b1c57ddddf2c9474983210e78450dee. 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/DEVU52365025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2ef9e3fc0d0256322eafcc0d378d8dbb977fa82d6c6d75496152477f8729d7. 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/DEVU52365027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa617e653850d9f1e99e03e9d1b0e6c5c32d8be3f289d0dca944e3a086379bd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEVU52365028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb731b9489739cbcd93af933f6ae129744f8147eff2117283f44c5558d4ca6602. 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/DEVU52365034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eac44b286ca49d13522871bca7c5b74bc43aad848b9c5f1946b6187e83607d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEVU52365037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4015b3c298e5a815bef12dd8dbf030752436086d400184c187cb25cab9f4308. 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/DEVU52365043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63941f9cbc89b825c433cd0d560b1a10b5c329e794462e7d42d90ff1f986e62. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEVU52365045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ec03b59a9db65699df7620bb2ccb72a39ded8e1c67ae2b19d85daccdc060c. 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/MX2629579470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d87458cf13950c0c975240ae5d6053ec5ea632833f4920b5b12812ceb031fa. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/MX2629579472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80fdc71ced1c75710a16753a18bc0ea873a79d06deab93107aa41d6df16564a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/MX2629579475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a701a8d65804ee9fd3b6f30020156e531cd8e3c998b0003ed8d548b1a9c709. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/MX2629579477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec584d0d783ba552590c43c7a51170e42e8c991132345f5f58e8619eb263f71. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/MX2629579479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b06dca2c33546cc95cf3a3db8c634135a6f746ffdbb182bf1df7a5b7b34059. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/MX2629579480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16034ccaa7ccee4c8a126f27ac80a43a2098fffd43af150fbc297f2b731e9f5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MX2629579483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11ce4a94270cadc9b504b3a293f0b25a58b27e0568e5785868a5eaf8f235fb8. 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/MX2629579489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9dfd30193bfdc5145254cbb2d5b4544bc8d07b28a51e063173edd65f0ce4b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE66N2323658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac466b0b3ea31bf10ab672daf11bf5c104d6034000648c707c07fd206fc3a9a3. 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/SE6A92305270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3966dafbf4cf674ba2a538a20d703af0d892e87a9914355617d9e72dd12a2e8. 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/SE62M2338164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74ac75141ff96955f02f60185525b0f5ccdc82126d2949f2ac428a11273f11b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE6XY2362564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ed66d6dee1780aa287e54008da4e7111b2f2051612e68e14b26e416f076af. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GXF9Q2598383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56fcdfe12eb492c4d55f52ba4d9f561fd5261453bff088162c686d6bc36e89e. 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/ARQIW2504742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91fc469ce842ef429585730a4eea687b75ac55a2c9139a5f01bacbb9525cf24. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZWDD2575398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a16eb55a699b3d51ea71522c4950216d852d0878d621664e7ab70be2a009f80. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWDD2575458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e0d2c38502e609dcdcb29ded42366282a4c459102dacc9c7dadbdab71349b0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDD2575506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e56d75bcce3717615facc183d94089507921414d640d8869305366c410e5d75. 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/QZWDD2575554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720588394efd34006c401f94f684f9e21a63cba923dd354b16b87f814926d878. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZWDD2575593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f67c49d5fe851894c760e175681644af3fa95afb1fcec26dcc16c245f4636e1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWDD2575640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8314c0b6f5b40be75a68a1e5fd43dc9f6e24fcd820f6de70ce7ba744279a1a1b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/MX2620776769.