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 0xbf30d0e63e29971bd456465e5d00789fbd86edf4231c49df754dd513ff106028. 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/badf47a5-d11c-4036-bd40-a46e6b2955b6.json and https://artists.proofprofile.net/proofs/artist/badf47a5-d11c-4036-bd40-a46e6b2955b6.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 0xd10c231b08fb8354c90126a32212ec27f7503d3f7fec8cb8727d2914c8b9cd21. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:27Z), 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/TCAHL2310009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb58f85c5a0fea98c2abda5d044243bc85d3ac4db326f26905b58d394026468. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/US3DF2414489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a699ab1e90cd6a6739e16408aafd82756c81e49919444f659c591f8387b45. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:16Z), 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/USANG2438126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828c22bcd77f49a2d594c86fc25629de972e2aa9bb8a20d837797ec44d9a0253. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2482149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bdfc19691b0f03da03dd2a2a9854d590fb683ee8bd7843d66611950c196492. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2415761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a6c9c6ea845fdba1878347c4f3979695b75e1ed62dd4d3bfed704df2ece528. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USANG2415764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706129e8d2fa4d491b50a7c4bdc78d1ac240d2af2277243994e9b8658c167e4f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:27:52Z), 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/USANG2496274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15baf34d59e184d1ee97bf64ce97f6e8f2aef637d5b82da7b548530b72d6c84. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:02Z), 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/QZ5FN2595538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54308b2899138a4a7549f49d163babbb669fee57a0041b80acbb71c17f7418f8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USANG2484304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6044382f86bdb36eaadb7f4c2be883a5141682f753b3233f1f75a8d0f969144d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USANG2505256.