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 0x30f537fa9c56061d492e1d5925e63210182526f71eda2221bf8b10eb08600c50. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6448cbe0-6737-404d-aab0-e6c54b3caafa.json and https://artists.proofprofile.net/proofs/artist/6448cbe0-6737-404d-aab0-e6c54b3caafa.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 0xb0432c143d918979f1ef2debc7e303a871be8e8447427e899f5dfe5bcb9c951a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AU3R31200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b4386b1ff362a6c0f3b1804ac409b9e96ef1caf296d6b534a2257f6e101b54. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:11:35Z), 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/AU3R31200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d1a078d35643eaf0d4093a81e2c1bb4d65a8588de4ee6af3d56caa7e182f7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:32Z), 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/AU3R31200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020cc20b97c3b09e0c089b7c30ae48780d97d694ffd0c5f6bc6a2f51d2187bbc. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/AU3R31200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0deb0e362ce92a1146b66c5489c6d963852ce6002f433b0866b55eb60052ef7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:17Z), 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/AU3R31200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b347ac174a2a562f13cb9ffb1ecf34b3c4224b023d2be730f6faaf265d8db0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:24Z), 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/AU3R31200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca8639ab1da6055589366a34110b5f9bac98475197567c710852cf80798514. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AU3R31300002.