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 0xc8a959e2dadfa1317f8165f4c0f3ffa79694f466cae88844531dce8f4742f923. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c2643a0-2ce8-4bbd-b4a2-aec86c413489.json and https://artists.proofprofile.net/proofs/artist/7c2643a0-2ce8-4bbd-b4a2-aec86c413489.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 0x782f8c985bfbed0e92f9d0fa09c0ed6c80258393e927e587220d729518c48c17. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:57Z), 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/QZES62307937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daedd1addd4f3ec2a060f536a8f272df65c12ad7656fc9385307c454cc4d878. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:55Z), 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/QZTAS2320330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce82cf50041d102443c0be1e1a71324aaffa3f6357930b5dc85ded2c444ca4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:00Z), 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/QZFYZ2445391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab8cb16cc832d969fce106d33dd1cc425a0c75dd27221825b7129f9d3485112. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTB22470307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09270eb527570ea8c5d1b81c02aa45e473534d342846c53b32b2279c19ab83e0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTB42422188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed5734f152370db40d0cd22077c6bb26197132afa0ce4bc1d63a3fe47b545c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB42422189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9391ae40e5ce126e78e4cde93a02b9e393c887a6a23aa4fcadf6be32828876d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:51Z), 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/QZDA52552518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146344fef5d53bf760c54b750cd8f9d2e2e3d63f9bf3f49596ebbcc36cd60a6. 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/QZDA52552519.