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 0x064ac2c67c6334a43d9e6b53948bdf3873635ffb0aae50b4f5c9d6884893e3eb. 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/1a6e1ec1-7eb2-4b6f-b74c-599006e834c5.json and https://artists.proofprofile.net/proofs/artist/1a6e1ec1-7eb2-4b6f-b74c-599006e834c5.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 0x8e903219f2748bb509c2605ce813b7fe1b54d8dd6b952906cbdb2df4bb29839a. 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/ITC922310351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fde7e552a8649c14259200c53efe7f01dffec3e8edfaef401ae742fe4e91f8. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/ITC920900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37947c26813832ff59765279a6e35dcc60e0bd8dde010ec383d9e74b0b70604. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ITC921800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e51863c3df89093fedd31b85e50043cd744b61ea580f023eb41997252fe635. 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/ITC921900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22320c690597d5f7d0ea06dd2d5984cf71f93c7f02af4e7270d72d269fa51f02. 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/ITC922000214.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7a0cd042be6edc8eff16a39965f8e94ed05f904a7e77a582870ab24462a16. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITC922100277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2aab6e88aab4a1afaf6b0c23d3ba2f8a7a3f5fd4d60905921986b31cbb4927. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ITC922200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cad7cc1e7b36f9403595b534c2a079146c1d994b18ef3e6fa36a684ba8df2b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ITC922200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a125e37f301825a088b01bb997b3afc8b50e827c061d9f68e82630ef27da3. 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/ITC922200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4dad381d662ce5ad3218e4c4db97d831f6c49ea1316e04f731040facf9a6d1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ITC922200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d93094be43cf4075a070b9b29bcab9ef75d65e5b674baf8adee8b85c8b6b7e9. 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/ITC922300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8649a75566493cd8802d6cb1ec7b1040e8c642c2338e983192a804e2bdc15c9c. 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/ITC922300355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b7599f98b5d5da45ba6fbc5272c3e7aeb2602891a237da9b85a09618b38702. 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/ITC922300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726e08fb18eeb13930373b71edb33782ed4aebaf6b7fcddfae29f9b9987f704e. 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/ITC922300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd3af83044b93c6f0864cd8d6c50c3bcfc6699dfe9107a3151ea55445818cbf. 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/ITC922300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f53b12cd8204ebfbe5f5faab834eefcb69780e8330c75e3f2728cb7e64fa6fa. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ITC922300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdeed7e03c0feabbd6b881a99e2d07e14729e939d709c8111030f17cb742d4e. 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/ITC922300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5baa01b25371e37e582f8f2ef9b739d5b32ea8fa5346745825d0ae897cd91. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ITC922400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a36be7665aafb416e3688bc04898bae9ab489505876ce7df7c6b102436d509. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ITC922400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c30b10eb92548b2305050c40571b18a3d05eda20b00db532bccd153a417ad. 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/ITC922400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2e646d1f3c33454aeb6d24fb5d5230f6234c7fa8343886df3e416597867196. 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/ITC922400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9681d676568c420a3d55f1fcbe90b259796bb9a3e34519baa612e3dc62ee5c. 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/ITC922400412.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c390af7d65dd634b6401350dd13aa326365ed6009dde300e0717bad7d022aa0. 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/ITC922400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0312574210bc245f3d53657c99a3ff474d1af5b55b26f50411dba722b6234e. 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/ITC922400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133bfc1905e7a70c8a36b2e526c4e2509307743f6aebf5746d891e280cff0a1d. 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/ITC922400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b26288704b990ef43971f3d88e39589585f3d2def04b50b29e9c20441af800. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/ITC922400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f77ecad802020bf4f2243ba0cae9366f3c1e4160e00e1542f2ef1fcf293b6d9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITC922400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c00bbcfa9bcb7d24a7e46de019cc1c1868c19ec738867f2e6375cf6282279f3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITC922400436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9066451be4a36d1b7f7bad8b35e99305a867d953fbe8f85086892f4cd6c12. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ITC922500437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897183d1ad43127740673d4dd16d17d0988830b565899672141fb2775d314d46. 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/ITC922500438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb824d4f32fa0114a7b3205163f398ee3d76594aeed689da7d576a816312edbe. 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/ITC922500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa00e50fc7cb22c9af37900241a12fdadd9c50ee547130d04cf41ed9cc091c07. 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/ITC922500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c99bdeb75b00ae6940155ff5c77b7f55439c528076baa7bd454768b60791f3. 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/ITC922500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf111a00b2dc53ce970155c4e7ad80f50a335b5a8aaa0bbd15d52b0d49e84d50a. 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/ITC922500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475c41842ab254fa3f9193c8da3c29c0d3725531ced5d6b2f54ba60f2a09cee7. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ITC922500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc661fe96a6f29eac60f2364434c4099626a04a184db2c6a27927c02d96f28266. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/ITC922505180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c57b29d72e952a9cbb6bd7975761040b4f8c5ca471a430cc32e2be5a0828dc5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITC922505970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9789773602151dce1be15807ff5f8884ed43586fd28b3e3efc07fa6fe11e61fb. 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/ITC921000158.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1fa113a8392446e8353121acbc7b0c999d360408b0c95ccc46be4b9f032acd. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITC920900029.