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 0x75a6f6be3b70df845675960b3b99c4ab9ae702d5d8c7e92d3ef52b6ac1e8f28f. 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/031040df-ad82-4e2f-8d70-ad7cbdf8c0f4.json and https://artists.proofprofile.net/proofs/artist/031040df-ad82-4e2f-8d70-ad7cbdf8c0f4.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 0xc7595845eaa12ad8699c24bda252f44326e0701e370308548b5fa8522b81db5e. 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/QZNWV2111472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dc58450790c4b7ae49b0490a504ed3dc695c3feb285c92b2413eb921480f7b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWV2111474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18130d56991d85956ce259018279696cbe0c8401207d4cab448eb9566c53e4a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:43Z), 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/QZFYY2231667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ca1edc8c16cb3ce28f65feaffbd0717ba109860b72b0f7b61cac2f0a423b2. 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/QZFYY2231668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb98ec4afc5025723eb346ad207a18e69b87a0ed92d66a605c9e8a600b9cdbb0. 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/QZHN32214824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ba89887651db48a50e581838fb7331f3df45cf2b09dfdc4e6422996bbc53ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB92253846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e890cc94222c5415e4ffbaaef7e097b0ecf944a83497692f7f3d2f35e449a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN52381601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174422aa50cefa892d38bf47fc89ea605d66b75c4ca07a0cbb8df3f6055c9872. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6G2304882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110d04d8be37f8fea688ab16803807f015ae681c017359f54f6225665e21d07. 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/TLVEM2473543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51094667accb8d5f3054be07d0cbac421a20c5b371cec16032448a623eacf3a5. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TLVEM2473544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01595e279327f41b1a3a2c80141d4d94ade8977b16f062d372684c9c1d7b7def. 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/TLVEM2473545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9002a54bf1818e51393bcdc004a9c045b3a9563ade45b3a6fb6a1fd3b0285d5b. 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/TLVEM2428944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec649ce6740f27d92118ae4cde84cffff2cc737882d4f85b4b9872e69dd2bda. 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/QZDA62537289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152246230a008c614da95df4d8d9fd834f772a8bfc247076f0448612ec17dc05. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZWFT2503679.