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 0x9ee1da530ea2bb1f315df32463484cfe47b6276a9b2d4d4adc0a35a395bb7003. 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/0f0574a5-3d6e-4987-9364-728a73619f9f.json and https://artists.proofprofile.net/proofs/artist/0f0574a5-3d6e-4987-9364-728a73619f9f.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 0xe85fa796a2de906b728d036b7b993533b1bb17e15ae91ae393b0df8dda795450. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:17:08Z), 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/QZHZ52062374.
Karla Mix Homenaje, Pt. 1: No Me Arrepiento de Este Amor / Fuiste / Como la Flor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160fea5ef266a7839c043d642b56eb738f3554afcf76acd7c377fa39130d868d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA61383722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe37bc540c0609e86438257e0f2886a6091a45d78e3a514ed036333f44fcc5a. 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/QMDA61383724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad2b36b575f7eb596e55f751da30a1c5ef5beb1a32d33562ee49eeb8878347. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMDA61383728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f24cebad88205e3a0a2cd22a021e467fa95a94704a7f5d6d583a7a84029bbd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA61383890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1def87195d19c849f402c878edb44ac6b61652e83f191b9f36b492701a691d7a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA61384132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6fe5be662997707e07a19e962779e96347c6334789d28a6a8f5bde8e6da953. 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/QZGLM2384060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75ad0d8759af5cf7c82d54fad86d84c954065f98e94dde432c06a69d0f534f1. 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/QZ5FN2002380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf910c492e3a896bb4b7d64f8cd6c9ac7eca8c45ef8504c9dbf33b8914e7fef89. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBWUL2091121.