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 0x273d8cdab5b596701906a0240f4e214935d6d84ebc0f327a0e5f4e9ead77d226. 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/a881b861-591c-406a-a542-af12118baa03.json and https://artists.proofprofile.net/proofs/artist/a881b861-591c-406a-a542-af12118baa03.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 0xcb8a3553b407e01cf58ee28c6bca64c2e20981aac9d74748f87dddacc6762652. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NZRI11302380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf92b657f78ba461b705643af8d9448c514919eb447b66198f93e76edbb8af6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NZRI11302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c242b2f4ef30b14f84f320c535e4bc2378667ac01a0d3beff2c57504dbb4b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/NZRI11302383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6f284cc71f8891f65d0a6ec9dc466267f00a23dbcc2832fbea5082051ccb90. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NZRI11302384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3047c11950aeb949ff52460deb11b686cffdaec67ffa192e93bc5ac7ba1431. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NZRI11302532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b9d9df7f9cfc3cf6bbf949332e8bec874c9749c8a9879d7dc8e87ce87e120. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NZRI11502929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f836aeb246eaf7f397790efcdb86cf74c5d8dcb214142a9722f8e46fe4d250. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:13Z), 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/NZRI12000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0749a09be892deb719e8d9cf7cd5eb8c60c0d2068dfe916bc4272c1fef3d70. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NZRI12000339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd236ce36dc69120cb2b78b4d4bf0b015ac377508215d558b69fdbb4943ba9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NZRI12000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63645f8fdb622d100252887ec27e07e7c5ba17cfde7732ecad9a5cdf14aee3ce. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/NZRI12000342.