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 0xa314222c60e4d69f931f5154407b3a86e9e5ac73e5e8b04993620e590fb510ff. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c7a498b-fbc4-4e67-8baa-886224874d2d.json and https://artists.proofprofile.net/proofs/artist/3c7a498b-fbc4-4e67-8baa-886224874d2d.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 0x3d63ed5a49d78a13863b93ee07a8d1ecc4bcc12c3896e9bc90aae1987bd926e7. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BRPOU2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100e276b23e3070b29437c9477a9bd3bf6ccc23567220d4a1dee6e08afbb2de. 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/BRPOU2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe777dd150f09ed6be38b414c9a76a73c26dc73850173eb487516df927486035. 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/BRPOU2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39614a95334c15fcb26f56215d3ed9f61fd3044c7dbd4e6cc2f5a0aa71b4de1a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:43Z), 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/BRPOU2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0784926a4285d9e47362b71df465d4a3be2f4bfd61ed5785ab98a4437a3ba0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:15:09Z), 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/BRPOU2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8040c0c37e41cb2f812885305f3f8b303ece2de42486cbfb6fd5657130c4cea. 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/BRPOU2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a88c21ab2ac61c4732184a05749d595dee5ff6a9a67fd41807388f91fe46d9. 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/BRPOU2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad91f086969e6c219f90ee1bf34274a3e74f720c789b684bef588571b973ba. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:47Z), 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/BRPOU2500018.