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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85847ecd1a7a5781742d2ef7adbb74285601d066383628676b5645b6dc3d7457. 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/7bd9903d-1bc4-4eb6-8d6a-c77edabbb32b.json and https://artists.proofprofile.net/proofs/artist/7bd9903d-1bc4-4eb6-8d6a-c77edabbb32b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961769f9b9c702d2f61bc4567a9a2b844c3457526d18228221cd25a4044c5155. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWX2189579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e29efe91baffc94e64c61a1e357ab30f32881cd28af8f5b1d1e53a46738895. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYX2280464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43756d858aaf8a84778c0d93c4b978dd6acce83d6f4147361a5f3940b717bb. 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/QZNWZ2223899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2720d1b00104eac5782c8e1b0463792059d6d7752eb4713b863e216644b249b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTB22255694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb036c7ef4f191083e72c0cb36c4aaf4b3768dfba5fcce097a35346df467aa92b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZES52393848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c4684b255d41114acd379db9040f5376c9cd0e74c51f184720c4383d13f06. 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/QZNWZ2366065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b912ff34a8c84165551a68cb199e73615388fa4766996cbca38f8e698f351e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZSYP2381157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cbde5cc0c357209b9720ac9baadfb491ad46128cc6d2c7691b2f7db002fb45. 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/QZSYP2394086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354279e21eaa868b435fb7750286e062472b2cc0d53edc42bedc8b5e3622dfd. 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/QZTLA2456151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6f1206ac9dfb976d298d239de0e12c9ec4478413257685c6823d1cf21af99d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZQAY2459245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7251b34a91c6413809a867aef959360195033741d2a3f450496f095519381a. 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/QZQAY2428363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156b9a1f06aab6c1d5be2afdecebf7a1b6b5dab743db8bc9afb23b950f3fba3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTL92486425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bff0db4c21ced8d4fe11fb6e917f77de1abaf286e746307dd58c0c4912d908. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZQAY2444272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9e6b14eb94f60ffb1785a538be52a1346386b65d6acbe26c9375dc2acdf5cb. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZS7J2537746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc914a73e261e35c2b1140ab4c3286e7cb9d9547fd9361e39b29a7c99f9898a12. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZS7J2567228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156b9a1f06aab6c1d5be2afdecebf7a1b6b5dab743db8bc9afb23b950f3fba3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:04:54Z), 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/QZTL92486425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aedc27b4dad5a5e3bd4227c1ad4c6accc9d8faf3672ec3b82386a797d1ee8a6. 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/QZQAY2519836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354279e21eaa868b435fb7750286e062472b2cc0d53edc42bedc8b5e3622dfd. 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/QZTLA2456151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac9c3501de01b40bb91e8da5f418b6a23385d3d769b13e3e1aad228a6ecb69. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTLA2576599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8346cfd1f6dc43b036a162f794be9d14d238e2ab6fe45222fe734757eab29. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZQAY2510749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba368a47ca0aeff564aab797e5930dfa4b6cde65f9504abf9d4c330e5fbb0c2d. 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/QZSYP2574021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40e0b2a91cbeb3a3bc11fc3bac411d370ecc9849217f1a99b782f10046a038. 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/QZQAY2576355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33697c0b2a99dec593645124a1f0945e6aa2db7ba76974874b20898fd17cc8. 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/QZTLA2589623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52c696e8bcd4b7bfde7f04d1d3416c53c5ae9301175994a7c57eaca079253af. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZS7J2529275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea48f938ebfff9414e3681b5bae741127396620759a4094b07b221c3a57ea01. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:29Z), 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/QZS7J2527788.