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 0x89953369049200e5489a0da67fdd4ee1e7a235b09a99038f748f3fd0d2a4c826. 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/b4a745da-0b95-4c1f-81e4-402296125a72.json and https://artists.proofprofile.net/proofs/artist/b4a745da-0b95-4c1f-81e4-402296125a72.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 0xd1138279df49cbbc45ec975d2b73726dab27b98d0deb9c761da89bf05ff1a0a7. 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/DEQ021802279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f127f03f9740b525069d7a72e67bb9f64315ec4e56966d02d25454b46085d0e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:04Z), 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/DEE861901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f127f03f9740b525069d7a72e67bb9f64315ec4e56966d02d25454b46085d0e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEE861901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9d20b5d40ba056fac3c2995fdf9d3eb9f1ad920859ae7094ce6f0545701db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEE861903662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01c54dbdb2bad8523c1797c4227ee8e9fbf6deb3e051d9790d3f0bdd9df08d4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEE862001794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e662a72ec0f40b572bcb04844ed59886850d0ee5b2c3d377d08d21d3362db6b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEE862501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed56058099479692330c96055107cf693161fd650497c7e0cfebbd04b49b0c34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEE862501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9708bfd0e21491b8c939d4612829f44a6028d142104e33644cb57a26ba3b24e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:17Z), 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/DEE862501370.