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 0x5a62a3dba7604b30507c2a2c95012343588903b1e6fc920649f752b1a19acce6. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46f8ff01-4f9e-44ff-b3dc-52c06fa0b62f.json and https://artists.proofprofile.net/proofs/artist/46f8ff01-4f9e-44ff-b3dc-52c06fa0b62f.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 0x75f04605a08410b3de57b7e291052df58e12092ea4c03499d791bd4738dc28a1. 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/QZTAX2441811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ab743f7be635b5c0c2568112a8e9e315d71ea1fc110b24c488db6a72353390. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:48Z), 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/QZTAX2441812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c05ee167f04dc06e3c1fa4bfff9785f6a76f2feabfc23a385fc08af1b2ae3ad. 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/QZTAX2441813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251e74c50855a13d59bc7a2c3f20b0181552597c2c92c2da470f44f2fb1e5f46. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:44Z), 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/QZTAX2441814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f29da371937dfb3359e706c6f7292b3b5f21f1ba0d08acdc4b31be768896ba. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:40Z), 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/QZTAX2441815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78259b4118e6cc2f6eb6c061aa6cdc5ba3a0021261f5f8c644169bc7ad214183. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:11Z), 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/QZTBD2445252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689407941a7feae215647f157f4c0ef56ac7ccb3f53550c224f84dc0e6f8c7a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:34Z), 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/QZZ762471223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f08c9bb0e3dfb67b62c8e9f55b7ecb9fffa2c34ca98aaffbc83389df2b3e9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:33Z), 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/QZZ762471226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb527d8f02a8404bc77419b7a5ac9dc3a08f834521b2796751dcb7de669631f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6N2401418.