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 0xc57530eb40fe1cfeb600d1a2af6828ec0d431f8935577ab1dd136d1bda8c4b76. 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/2ae8d781-7a6e-46fa-90cc-b22ac0cafe36.json and https://artists.proofprofile.net/proofs/artist/2ae8d781-7a6e-46fa-90cc-b22ac0cafe36.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 0xac179e1896150919b8fe27c16d1577a56851f5b50f18ca3b3af0e937164e821d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAGM2203135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65db9edd52459749ddb95f17c82cc342888ff2a51ff20396cfd42b4df105669. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAGM2203139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0824fdb87833b19db2313bd926b307f9ff88983cda3f094e150226dce352aefc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGM2203160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f6965173151c7a2c9991f54c0a59d0f5db4eb5ca0d1c29206e2ea0677ac2b5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFS2147727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65219e0ec784c7052da04856e3050f22a6aef725560a18777a31b36cb89c5634. 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/TCAGS2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250129176dc360b9b6f4c7d9a2343bfe6b8c5cc86a247158dc99ea39390b1d7c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHY2423969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577cdfc363e5b1bfd984640829c38d890cebce7e557b2212a77b05b2173f04ae. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:13Z), 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/TCAIR2465632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bb94a5ff753ac912c5c17bb745e5cf620e241474ecba11cfbafe4621a3d2c2. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TCAJK2568942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0351769b4e0f424b4f99281de7dbe750fa3ce9b64ee5719effb8622be40a607d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:17:52Z), 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/QT65W2576009.