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 0xfa4c66c151b8ba31ea7f55817c9e3ac5e8f2ecaf805ddc65f040227057c61824. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdce40e5-25c3-49ba-bfe5-e815b52f8b48.json and https://artists.proofprofile.net/proofs/artist/fdce40e5-25c3-49ba-bfe5-e815b52f8b48.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 0x66233327fac1be55ae51caf4a27982f25780afdae11353d783cbbc0718732d8e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FD2587699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcead173ffd8a5531af35e715e21d24c94d65e63fc81360f6d3b82c852f13e4be. 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/QT3FE2583607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa393dd858c623f11e7cc1906559bb784a456c94fdf9788af9b306b1d89192d8. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QT3FE2583614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad524a7ddf4165eb2d78cb48495da65c1bfa97850aa8bb601f8ad9a92d81a17. 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/QT3FE2551991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ff243d20c34d532ef3a18fa1f956d0275054a029d296c52374e4ebf94d02b. 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/QT3FE2581530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e625b5a491ba52c6e4cc9586daa4eb42334557efee25a744914deb6c032fae. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FF2509500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4123690e0144b846a35b0f20500091f0f0cc03812e417dd2a1b7c0a42312bc2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3FF2505681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627dc57f082c8969bf3a11144838be51566c7ac5ec71d812c494eacf03c92349. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QT3FG2507537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286cd1a116a6e8f97933a06f321bf42e5cbde973c68aefa3dfbbd14cf8b4f12a. 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/QT3FG2540218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea187bfb7c5be58081294ab6839960df5e9f97d8a858d483fa7a611b0df2137. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT6E52553919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d11ebb26cb672ccb3b7b7a21138a46e0caddc6273c11e95f369c860cb2780b6. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QT6E52567161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79162d56adab9e639ada40b39ddcef5661abc983b2948bb259ee166d01fd1fd1. 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/QT6E52588061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da22ca7954ccb0adca36e8b0780f3d79d10ca6042f98fdc8a7e85d9324539c2. 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/QT6E62501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba27c93e5fbacf624d2cdbaba557643a5677aa674a0c387a459c85e0ac5934c. 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/QT6E52557201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492dcf5ef35e6f19f19cb7a3cf5fcadc5b54bef0d375345031dffa016635f2e3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT6E52567061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a516958f8386cc3aa6e8378b9396b4c21b469c05138eda1a7245b0792641ac3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QT6E62557928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e43476cdf98f027bb947d4ebc6007add390b7dc80fa3f3408de46637bc8cb. 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/QT6E62585035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0993f416ac92a007ab0dbfaa6c96febe99483ef0619b58842c3ee2412118097. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT6E72530792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc12a039ee4d7be1b745f109bfa108a08560da0ac90a93b720e5ce244b4a75. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT6E72532892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684c7f306f67e8529af4d2e841246fc2ea78f954ff936b9b451582123bc18bb. 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/QT6E82578613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb8274254624ba1dc90df761700d227a574e2f60f5d8535c97043511bfea1e. 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/QT6E82573853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0cbe415fb0bd098dcbe3c65fc131be5c5bd8286511b94113460dceb97181db. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT6E92514095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c7c27007ff22fb22206c58cb7f29630f08f9a9382111739b1a03b656165008. 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/QT6EF2559916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f04d13f9fb03c48f4c25467ffc70afa76b9ba466f40b3e89c9ceadc9336692. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT6EF2572252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314fd4653925756c55d43f7da2e3b5ee32d1e7bbb73bea552c3c3d5a255215c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QT6EF2566159.