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 0x147d1578859809254f338719bce5dccfcc6888999a4924d627b82b4f8a496773. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb33f32d-a02a-4353-8c81-0eb64b0d1a3a.json and https://artists.proofprofile.net/proofs/artist/eb33f32d-a02a-4353-8c81-0eb64b0d1a3a.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 0xab687db6dde4892eb4f987a3269ca03980d5e239b763a96d49c09b6bc452261d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:42:07Z), 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/ES71G2427409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484ca945aa5848215279b965e8e4de143ce4b09464f0afd0031804f8f9ce7fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G2427411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e68e51f911d590f524321b6f4050287f0984c0d733a4ff843a92a6334d24081. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES71G2427412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efc5adcd49a2dfa3eac02c6783d3301eaa3346139cfedb18dfa65ffd519b82a. 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/ES71G2427414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf43cfa62e1cf73cef1182292b48fe033541bd3e08016ef4e082debc989c9b20. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:12Z), 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/ES71G2427420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638c0ef090dae4bc8eff5b368563da5a33a3e0c7ca9d8e293623d9cfba97a68. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:40Z), 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/ES71G2427421.