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 0x9762cf6c39cf7503a406eb4d123ce4267ff270b179af8bec6426a6cdbcb0bf16. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c350062-f45d-42c6-8bdb-9423afef0466.json and https://artists.proofprofile.net/proofs/artist/8c350062-f45d-42c6-8bdb-9423afef0466.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 0x1f9f3117d8e2585e69de010045b46c885ab9b32eea7329b4d4f35050b3d54f25. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNJW2392919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34770867c1ce878115f83f52a30580deebf120982cb924410584fc3fa5f0341. 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/QZNJW2392922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0fe3d4e89bf18db463e1fd4b278751183bb306ff1157327f729f4eb3a46b03. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNJX2364730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4eb9c5be6d49f9cc9a01ae2e556a7889773a9afe9194fb66310bb85dba9543. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJX2364731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0309adb9434758a56b932d43efc5877975b717f769571fb91bd53e22ac61a079. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:29:49Z), 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/QZNJY2322629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9955c45d07f6acaec6e936f9a431f5f88b8856e324a6f19389b5cbba93157782. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:30:26Z), 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/QZNJY2322631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f7ddf36a5fd74d05bc18a58ebdd66fcb6849badb88bc2a4d6a0e3a6c18b4ca. 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/QZNJY2322634.