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 0xa881b6e28ee0299e79ba51d76b52d5f75d0f7e991b70c5f1e443102dcf1015e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ca4784-70f1-4a87-96d2-d1cdaf0a2580.json and https://artists.proofprofile.net/proofs/artist/21ca4784-70f1-4a87-96d2-d1cdaf0a2580.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 0x42dc1ba588fe6c4d7b839a99afa197423c5d416c99c8c4ea520391d9eef9e013. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBSMU8930096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a8d0fc276194deb559c1a318803eabb17605cbcb5f05cb9cc0e56e7fc9260. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:10:02Z), 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/GBSMU8930098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7773b2dded23b3e42aed383ce386fa7cf7609f1e212f588931a6aca0f507f6f. 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/GBSMU8785185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa071c0cf5d80717bf12a9547af5e4fd994ac635564f249370a6d9e91b830e63. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:43:44Z), 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/GBSMU8430060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c768ffc7f07b3867657cb7d682829f1c1c37225930d284429cab32907ba9712. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:33Z), 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/GBSMU9493273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6b9b033f44665b6722618d5a17546d9ecd698a53b3587fb34c756edd2dc73a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBSMU9493276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84658dddb9de5811c558ce03945674b33dc3339161d02f141eb25a5604fb869. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:15Z), 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/GBSMU9493279.