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 0x4c35b0bf5f40da5f2cab09f0a2950779d8d295eb68cba6e2cdd7779b75940e78. 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/cfe69003-5a75-4ab8-bc7d-ff583e208ded.json and https://artists.proofprofile.net/proofs/artist/cfe69003-5a75-4ab8-bc7d-ff583e208ded.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 0xe23466dc2d34bdf765bbb77d8bea1c4640588fde091972c21e6ee77223d85f0b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:36:23Z), 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/FIBAR0200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb07c1cb30678bc4c814da625691fa549275afd1fbdf5a578856d347433a056. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FIBAR0200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28ae54e8a2fd75556545d37286ba3569dd520e82fbbe3e8c5afec48b4f8d99. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FIBAR0100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b55457b2fdab5657164c678f07663ccf912da743668f6bfeb10d6547b0fcbd3. 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/FIBAR0100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d3492e8363988718dc6d6d9d73e65386d57be6d4500ffd55660c7ee71c705c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:14Z), 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/FIBAR0100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d411b7b7313406def3eaf1def9e523446ff776bb2595d1098fc2fe74dfa59ab. 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/FIBAR0200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420568d1a1cc328098fe2713b719a0f12308b03d5ca2163f3adf66bed878dfcd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:44Z), 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/FIBAR0300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdf778d765efc79685afd087603d629577a9237203085bc487f7a923b58469. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FIBAR0300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79288262f7313f6ca80ee41fd33e146749793175cede1af7c568a4348cb40495. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:43Z), 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/FIBAR0500045.