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 0x1516cdeeb0f66320d2875dabddf97408a7acf19afa9a66e0d6a175d881392527. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79869ea5-780e-4659-81bf-26907871b473.json and https://artists.proofprofile.net/proofs/artist/79869ea5-780e-4659-81bf-26907871b473.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 0xb9461387ad6bab6ee6167b6fd6c2bc14c8af1769a9e949a2b782855f2b801fd0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPZ922407371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5754c8f27607a1a1745cd14c2a8d8b205ba3e437acf8653b6fa4f12b1cb96b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPZ922408806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd104d90e9832cc3d9fe1e362e30c03b39b8e598253e8923a09c3b88e93cb8251. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPZ922408807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c18bd31d6328f7d5dcaeab4d31a20f13b5f794ea41fd7d8c970ea03a51a38. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/JPZ922408808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846989a556c982a0ae8ce78e155269a80cb27864a61f7d334fe23bf3dee3220. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:43Z), 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/JPZ922408810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd6ed34e939d27c7bcc4002b4b278a4ab9575a4f4dd83cf9a541941a2437ff. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/JPZ922408811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f62c05f86288b86902424eb2b1f7fa02c993a5c795f40bb7ba6761885d4b2. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:20Z), 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/JPZ922408812.