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 0xe07bf8eb47b2b149f5e5f6c5a68305bf58c6eb8d6c0d9e54a76166eda44245e9. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/805b76ef-9918-4c82-b224-db1795624d1f.json and https://artists.proofprofile.net/proofs/artist/805b76ef-9918-4c82-b224-db1795624d1f.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 0x79406f0503b8b79e64c9a82fb89aa738ddb64cb6b1b27c33eb2682b29f22533c. 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/ESA011620899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aedf146de464540b9dcfc4e9cf316560aa42c355884fca3f8ad85a7ed4348bd. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:49Z), 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/ESA011620909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd21d63b0f3bfdf54241108420ee15810c3659d7f5cf815bcc7941b13a22af. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES92239264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a571b83b73d5a0508d63176088d6054fc568e574ccc67fedbf7273cc428007a. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZMEM2266986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2de7e4d8c7592ec54a3a84eb61a3ad8f307d5eb25e709c62282a36d0e4a70b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:53:56Z), 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/QZMEM2266987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f64a162518320096b6a283bd742f74c906eb258594624002e6999b0526764. 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/QZTAT2421018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a142da6da70a6e9d21338a8f9fb22baf5d714f94e255c7f80eab8518b99edd7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F92562990.