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 0x52e241928962b8f1ea28906798042d56ec275ae0f2ddca93de0f033cf4650971. 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/5803cfc2-6046-4a29-a52a-2c0c3ecb7d30.json and https://artists.proofprofile.net/proofs/artist/5803cfc2-6046-4a29-a52a-2c0c3ecb7d30.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 0xa7ae0fa171319b35a5c9dae3046b73b22bf710a52a6cddb93cc605a82e8b13c8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:22Z), 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/USHM92119738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd974f3d56683de41d2c93209db7a4b3cf7ee2576b88ba17130c8746cd1cc89bc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:56:40Z), 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/USHM92119747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33a7655f4345f370996136c307965ea20905fb4062fe5046e14a2511cc8c0f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USHM92119749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b9ca6b184c97cb3fedf5c236602834928a966240a7bba93f8d210275c1ab7a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM92119750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417241ca2560f5c0ed68abfd031a98bb2f3a43b2069e1751947a16d0af868c15. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q2463169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51477a495d4e4235f55c0322d95ead5c97aa4cfbce04a5aa249162e4568baa2. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USL4Q2473577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b4e0f8a82ca071e1682e54e69bd493e58c09d096d7327e4ed128c3d57bd380. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2473579.