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 0x9e38923e9f626fafed9ba17ec74ca5ffa083bb9cebd997c56e98422a9d660f58. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07eb22a3-be96-4f86-a163-8d61c01aecb8.json and https://artists.proofprofile.net/proofs/artist/07eb22a3-be96-4f86-a163-8d61c01aecb8.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 0x267a6fd923fec021983ad5d0e5d885de7d6a0e02cfcc71d080a31a98da7b1678. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:40Z), 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/QZNWV2012573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5b43a6398750c7fbdc4403573bdc423a68c5d88e6f1fa3da0410117492053d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:52Z), 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/QZNWY2000726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7f4377cb80dbd8e1ab8b82cf90e63701aaa9b680467199b0e780af78e84e8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZK6Q2215898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c5bb6e8c4ca9cd42a123b3c871012b287278cd9527005ceac5c9f1ccb4e672. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6Q2215900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a7b6fa5761b1acb9f61b5f2432963453f1e77750ed7e399c8b0b7c0b152443. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6Q2215902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963e597fd3f3051a5deea96b8a188c711dcf70dc3e4c2888cc1223267af627da. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA52373725.