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 0x43449b1ec1ce3b633b0ed405c12061301d9db3f923f2f2c8c400d18d1fe09986. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/266f6153-a4a3-4200-9356-9fd9582e30e5.json and https://artists.proofprofile.net/proofs/artist/266f6153-a4a3-4200-9356-9fd9582e30e5.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 0x9424e53506632f8d2b5161238bf781cb29d7f7284cb79ebcce909b7282fa3e9e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLV62316347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9803cd4cfc11bccb7d8c3d68751bbd10fc2d7e15daf552b3f5fccfac2ab6ec1. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GBLV62316348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314d662750f3f73e3dd2e3bbbb21a83b3a938ed072efe6f387670db49babfff7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2378775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b509f3293f0e530fe3714758a7cd4a3f5cf58c92bb875395dabc3ac202f08e. 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/GBKQU2378776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5762beb5f356b9e3fa06a2a325ca6191c91af98428fbd165f1dd1149cb87dec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ8D2101146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a7ee38a98977a6a9f2e76f10cfdb05259ffd1ee59049aee247971f8a1441b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLQ8D2101147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d91b86c702c525f10973ca6bc64a4486653578476ba5c966edea702f071afde. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLQ8D2101148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dbb627dd480e3460f5a460b7c06b0168de4fc75cc048aaedf6348484e4f910. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/NLS762300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef809d2ffad9f668ade21c56918ed53956faf41e4832cd17431a0003a0751163. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBKQU2325423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd64febdf3186aa7872fe297dcd53536234213fa7279ee2c524a7c527282218. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU2307351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa628da8ac835fb8b40b4a9c0c48faf4e8a37fd09b4f425a061d9f80b2dcb6e0e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BEB682200338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffba0e8e7db8ff7cb3cf0e8d37dfe36bc15f3de08b4a282d6c92ebc93f56fdb. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USLZJ2261460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bfc4ca765f3090e38c2e88132fd44aed671dea4f4434a842848062906fd537. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB682100533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a9738bb9c155295bb3f65bd318e966b45e22466398ab383a501d8b85ab01b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62138767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a2a97f74e9444fea4ca51e6d3258a53dc930ee4957efa9d71726d5385584e1. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BEB682100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b5f09e8e4cea415be538f8d02c327f2003126c58e05b1fc41f3826d2b0b3d8. 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/BEB682100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc140f5d016368f717f26022bca535d2931a98b5d609b57a59b5ca04b7b2624. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLQ8D2100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e9671f7808d3456133b927361a155bceb05eb7ace18cda4f04261eecda83e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB682100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a880e63113a2103329090b760c1b12b184348595f058ee82400f35f13bd61f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BEB682100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a0eaccf9145bef2e6650f5c53f64a50411a026e237ab3a2c52e1d8ea3159c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZP7F2117844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657320f9559c0672cca1717fa52e8311d04d2cd9142134e3c0e88f0a5135dcad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB682100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506789dc22eff2076a305f3874a55d68ece545314f7b0928315fa48ec9a990ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB682000522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670045b578f10fc018ff8b71a9e4ba4e4284917fe25ce6101545ecadc285a920. 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/GBLV62006893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1bdf8b292cacc67bcea24537f20223ff589888aff29aba3d2784d61116c70c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/AUXN22062934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62734070fbb7d63946a1362a542e2009fdf625e58aba7f2374bb17757fb809. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ8D2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f1da46296ec80d6ede30b39b7e3479929563691e48b36ad96397b6b512ec40. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLQ8D2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0afd24f40385a51b18a894da58675dc1ac4713664ad5fc0ecf7b0e5b7d6a710. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB681900382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109dd97d7e3e80f503262c53e328c995d335c23b0bb6f26c32bbd1d2e423f8f9. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QZGLM1951511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617dd58f11f88376c43d173ff48bd7a04be6259243235e595abfad305a0b71f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLS761900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0878e8798eec8d089bc13da1d8166b6427c584f9cbe493adc300e4712b2c3d00. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ8D1800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb853469c6f8f010513e56c34ea4526ae324dc8eb87115edd3d9028b369920. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NLS761700331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ec6050346d5f638844f50a025fa1098be1f7d65091a09542b34eed4dd2ba2. 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/NLS761600487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5de6245ced63d991512ffdcd2b5263ac42a71f9d9f3ed07864912ef256fc1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLS761500387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eec54dd3a1c48f22a46df44de5d7bb6dd26488d274ab509e4b48b4574ea42c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USLZJ1544218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611b51dac1a9b522e5f7e0891e1060af029aceed37c86e047a46ac9c4e89a018. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWR2448351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf337d0a811389e0fc7270ad91a7b98daed524d514c3196e393c7afc66fe0e09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2417697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b9bf531fe037fbeede963049986df95a12b561155c877e0996cc240042296. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL8RL2338336.