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 0xf28af4268fd3536c9c78591471874e4da0c305fb2d47a93cee2dbc0a1fd7a05e. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b649ac21-7764-4dd7-a683-17f0756cb363.json and https://artists.proofprofile.net/proofs/artist/b649ac21-7764-4dd7-a683-17f0756cb363.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 0x028bd9f51311893b26ed3b496e39261279dbdca2591755f4ed1f096e9033adf8. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZFYZ2597509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03638259119f2c9cc7efa4cd20d743ed7eebbd78e04b061b0ce8f4076ade701. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYZ2597512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6a5dfcbf79ef201e12444f7b70a6fa754129352783ba0c341a25da3f17f69. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:47:24Z), 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/QZHNC2585874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebfc1a82d20d2df59972713b90c742a8a3128d0e4cd86aaa6837c86965fdfbf. 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/QZNWQ2510231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c726825558feb7b3a4f42b1dd40f0b6d55aa9659cd9eaf4912ec3b9f5b5a15. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:56Z), 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/QZPLS2591654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396a6fea5d66f95a22c1127e09e3decd23dc32f1be2cff28257c4db4301d956. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTBE2580040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cf1ea22b23ef769fe41490d243ec9808d24508da97843ce6d7d2c653e4950c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFH2536214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a741dae9021a71a645c679947e84e1f66040904f9df3ac7b13c73d9c2848dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFR2505765.