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 0x07baea4826bf1b43d3a243a41f344c028238740e3f5397c97cc5dd3e7435c58a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c88c3000-5117-4366-bf68-a64fc1caa331.json and https://artists.proofprofile.net/proofs/artist/c88c3000-5117-4366-bf68-a64fc1caa331.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 0x9d668b2b620bb45013ce99fdfc845e44a09f68705056b903beb38df8b311391d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:08Z), 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/QZHN62393859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434f456272ff5a38dc49399ee93814f24ff7b5f81adf3991b506be8dc7829806. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWR2382479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2283fe7813d643e4605e9ec54d231a868024c807b5850cad3a7d21edc6171024. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFN2397576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568b199fec57b7e14e85343e37faeade21cd0fdcdd7d6667d27fe6078f95a8a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:23Z), 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/QZDA62498799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e61e807b7fcc9792c33466c835953e6f21ddceda3ff79252071e02d63fe46d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6J2495897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830e058e79ebe068cd4eb81938b8f2e6caf6c6e4bf775b6cb7bca375041460de. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6H2499481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518867e7d137a29b9e8fcaf562fb600cb8431d9cf06be656dcac253cf005518d. 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/QZTB92406108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9c4ce3bf45466f6df40bec3fc9505b236af30ef638e97867bba031154bb307. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2402829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a7e4c04c372605832e894154c94895d4c568648fcb20573153e754154b9f9c. 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/QZWFT2469435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61938f4a9aa4809244fc0a156d4eaa9de57a92f312251906c3b87a4f44187156. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT3EX2428789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc382677526361d5462570387db599b1fdcbda67e789ea7c8558ad379e3cbe91. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:01:54Z), 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/QZFYX2565449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1643c5e69d676ac4e72b7ed03bf9cb7c69d47080cc109d692db9f352f15929ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMT2521101.