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 0xa13bed3337302023786b3141442852d6f9dd469349da0406461815171866f81c. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c90fbc2-3129-49b5-b827-5f4870eceeab.json and https://artists.proofprofile.net/proofs/artist/3c90fbc2-3129-49b5-b827-5f4870eceeab.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 0xf82aeda5d7008fad07deecb64462bbe33b4b73361bc9e2914f107701c50e5589. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:00:35Z), 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/UKXN22379829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6535f1407155bfa3baac55156dd1eb37e1c30c205a7e066a396bb928d8e7f52a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:52Z), 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/UKXN22379830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99213d5381d1db6963d711b140eaddefee1ae39f2eba283421bce6c0e413f3e2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKXN22379832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d316842e65e720fb6b5d40b33222f0d90450c0c9640ac95f16bdd295e3931c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:32:19Z), 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/UKXN22379833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69326a0785e6bece6fcadfab1970a3c3d101bd07e3f5f3ff83b874a31e80a60b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/UKXN22379834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77701b904565c01f57fa9e9df20d4985d89d06ecf5c9c9ade508989cfda35bbe. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/GX53U2423256.