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 0x934fc43870c7ab8a936b42e310cb2a4fe0dd918128a6321d81021126f56912e2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64e1e7ed-a5a7-4d9e-bc70-4218805aa4b7.json and https://artists.proofprofile.net/proofs/artist/64e1e7ed-a5a7-4d9e-bc70-4218805aa4b7.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 0x324ed1773af4d296142ba39184fc4e169e572986bc1ef9227746cecd191b9893. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USQY51223413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a962bcfab38e60cd51869b30660090d0a5c41183269343069a5a366d765f9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:36Z), 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/USQY51223418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb248edb3eb46111109319c74ca00acb5d9ee54f425045a0269faa3c0db118955. 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/USQY51223420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273d47e02f54d125dd29d2462d529cf2a0d481d77c3f3c26147a7cf077d6a8d. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/IDA141703878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9559525480f31691727a73efd67b286002c61d75a044601b831640f166b933. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:26Z), 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/USHM91962645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733378db56d94624639b9fe015145ceeaa54244626d4989a65802f29d6f83491. 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/USL4R2220083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de51fe9a9dc842a3862094cf2602133fff3d411d0ad48fefa95208122045c0a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IEWNY2428056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549e4363e912f8f979058d34b58af283e2f6e38657df3b03fd15759c90731df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X41723607.