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 0x1fc6680a7ab01146d9fee176349ca263b1ca0e40e63650618ef6bb65e475054e. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/892eb864-a511-4e60-8d19-449b26314f33.json and https://artists.proofprofile.net/proofs/artist/892eb864-a511-4e60-8d19-449b26314f33.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 0x04a77046e03000ed3137d685fe0fe159679ae0b1805357a1a58cbe76fac2af10. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:10:23Z), 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/QZWFW2465423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762dfa87bfd60dbcaea2515b620b7ee0eb5a3e5a1157eb0227cae4bf3f78f04. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USHM82130434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ad8d88db5c157fb758b1498f1e372b7094eb46dbafad3a0d619d21cbc3da55. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGJ2240479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb591d2030fb867a9693ef39642d8b8c36a8462ebe032767a686bb76800d09d5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:44Z), 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/QZTAW2335245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7c47d77af75242420853330004a933323dd260606a88c72ac7164fb5312c58. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZZ662486435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c8006f08c3c6afa16351ac8760100a94fd06d7b56da0ca6a0311f786bf7a0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:42:13Z), 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/QZZ772587658.