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 0x58654ad213d434c58b6f2edf0898042fc15dfb2f9bae0906dcbb43c12adfada5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6bf8963-c4bb-41a8-af98-250c0f4755dd.json and https://artists.proofprofile.net/proofs/artist/c6bf8963-c4bb-41a8-af98-250c0f4755dd.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 0x7cc5bb77e5a8357426e28d578c6e3477d520c228af923b33e3e3158534d4ba83. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ7L2552898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af34218ddad4e17e9a9608de618542301291e34b8cf98e3e1b7c75afba85e62. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZZ7L2552900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60239d90e79db1d7973591fd643e7f780fb18b21130b25c4acbf59fd2313389. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZZ7L2552902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd02d5d91daa6a336aa0c4b048c65a59fe907a8689e70845c3e659d2df32903d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7L2552905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c27850da63dc18408a04092ed0b0a12b727a3ac11b5f08bb72c235d0c47be98. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7L2552907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe977261cb46fffca29aa3ba3fce472d4b78056884b4aa5e0f38125fb605a26e6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:27Z), 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/QZZ7L2552909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf6bf6d57146ae75206044f80b5bb758862e05cb43bfeb3fc13640460af66f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:51:34Z), 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/QZZ7L2552913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5c3e0f63ad538f52ffe61a6051c8c0037b0020688f205e6a93e9a8ec1b26bd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7L2552915.