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 0xf4a361d94edfbcf5a770836dc8dc08261f3b6cf7fb9146894fc0bb1748754c02. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96b9cb33-7021-4167-a0b6-ffe8c8a404b3.json and https://artists.proofprofile.net/proofs/artist/96b9cb33-7021-4167-a0b6-ffe8c8a404b3.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 0xce46e3ca09b3fedda1bd361d238557fc290258640c1b3b7dc1dd5e4923af9f2b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:37:39Z), 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/QZNWZ2047542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8002c3e15231bb49b9cfab43e777d4f66ee8c3c19dab301d7cf5e508919b7563. 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/UKXN22127530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f242d3723558ab92ef16fc1140b75c00805d93d6c38e422b35aff724c65f87d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP2141042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3329c53d2d35138061d4e4d9c5eb8fe46ecce30d321808b8a2801b5e6ac32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2076096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf021183e5d835639499cfaa83be5c87f249bb3baa519c4efc18fc77ab2973c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLFP2058171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb4ee51a50f4ca1b5371803190923139076d21840fae730a0e5bdfbd4547c35. 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/GB2GX1800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18c7373a07376960ea6971d57bfcc64bdd4fa7d27dc114c4f3b78c7e9b82d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2057247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c2e2f25d22365a580f855eaa4046c5bd002c99667d294c31ba8fe6be8b2ecd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLFP2057484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203d9a07b33874e7ddb5513f5d6e00a81c7a5c702a1d93ce77f777070bcfd89. 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/GBUM72100471.