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 0x42541c5eb99b5542ce219541d9860ff350a7c2149c8b68ed6361dbf610d7c0a2. 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/76cc1ab0-8d92-4f09-b161-a170753f2b27.json and https://artists.proofprofile.net/proofs/artist/76cc1ab0-8d92-4f09-b161-a170753f2b27.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 0x395e9f9d26e4177b732cc9ce73855bd3d68d5722776a42cfca5004a1071ba8b3. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/FR10S1964439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6075d5b7f8ed88d5855bde9873f39b70c86e9ece51a5f3a8cb15f354fbfced. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR2X41965474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ae3b2eea06526ec5de67d9c3a946bff2bcf00c5245b27b92e923f34592b00. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/FRX282039537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf790e31767455866260841a173a9b06cd4904662555cd4a6ccfe684b7e93ac. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:16Z), 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/DGA082310839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612382bf1d50a0cb610926c9d69f8327cb1d1afdffb3dd5a590a6f35c5f0e8e. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/HKG731401945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b46d213ff024637fb19b529cef726c90d5e4563dd179db0bab46e99f36e5bd4. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HKG732499380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4695975a2358f02f633eea9b39eac006b6ff3de8e8807a2261035e35e53207. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:10Z), 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/KJFXU3568085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2523fdeaa948177d1b917c1841b9b2822e49f8a82d32947b34d73a08183523e8. 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/FRX282579007.