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 0x3e7d884e470983067fc152996dad8963c6b0ce3d01704101bb76cc985c298f1b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c5de93f-032e-4934-b01f-c80fb11a6404.json and https://artists.proofprofile.net/proofs/artist/0c5de93f-032e-4934-b01f-c80fb11a6404.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 0x7092e7e4141acb403813059a90f94ac02d3f61c0c8c8ab33f5039434837da5ed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADN1855238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd104f4243656ec5ed7edcd6e149e73641771d4cfbb124b2322872975177d22fa. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:25:06Z), 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/TCAHQ2377978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e50074f2bf4d7d33edb33b674e39523f654df72bd3c0cc1258e713999d2df6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFX2198071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aaa7c24aa5ef52b4762e5947d1d936b2eebe8ac35986b5792a7dedc02caac3. 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/TCAGD2283351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba57972c95f6210953bf09bb2b0c864208afb87bac1862619e15fa504b728594. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:52:00Z), 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/TCAHQ2377770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df3b341d944a8763fe67783c5e1a4731dbb91d77b0b034e09561b09da5b533e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:51Z), 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/FR9W12501672.