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 0x354ffc64d5f1af2f1d47978f846dbe6800afedbe29026b5825e0788040697eb6. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb6576fb-cfee-4ed9-b083-e5a2d760f11d.json and https://artists.proofprofile.net/proofs/artist/eb6576fb-cfee-4ed9-b083-e5a2d760f11d.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 0xb1d1437d56c596daa2b28270fca6c5eee3063b42594628a3c795ed504d8b9466. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2182305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd321e87431d02531211f2faef1438c1b77df1cf3a804fce5e493176206afc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:25Z), 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/USLZJ2358945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99b182084ea48bc8d6b9f15593b5207cbc351858646a8baaba1548b4b693cd. 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/QZWV32471369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c6d2848671aca1ab1f2e90f82849f4ef20e412a6195eeddec75a84df8a39b9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:34Z), 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/QZZ8A2465025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba56a03e0cd93ab748b63c491595d95431edf50488a73e1f3e238b8b31076b12. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:14Z), 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/GBWUL2556864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668f26057a1f939dcf34fc4802139ac5f8a88c72314fda9d303f8560aa4dd0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHG2373721.