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 0x5c415ca999fec02b1c410d660943c10a3d14650237f4c078c9774d159f6adb96. 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/5db88286-62fe-44cb-9256-ab426af00827.json and https://artists.proofprofile.net/proofs/artist/5db88286-62fe-44cb-9256-ab426af00827.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 0x5f216502ebe9533050dc1b10c65515e5469b8218059487b6c62f1e71e1a72570. 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/QZFZ42072725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa337c7b8a443448fa598b73163db3ff80418a51fb3424925b8da2d1f728254ff. 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/QZNWZ2133379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb371d93a8b90ec1888a4900210534475cf031740a47ea1d1b3732da495f996f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWZ2133380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84b44ae691342ffd0201879b6ccebd068a453f758a072fd61e8889cf07932be. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:52:03Z), 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/QZNWZ2133383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c36a776b070953a62cb8ba6ab58d690c6e486aaa7a0ac62290d60c1e55b534d. 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/QZES92271992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6f41364dfb4a519c253eb1cccb0b2329dcea156d9a2bd19cc253b75ab602a2. 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/QZHN92214990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3321af8c9ece1d4587c0749425eb7af5914bfcdd7806095ba6fe41aa7c20868e. 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/QZHNB2348898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2f0ea7c8e2a14527cab177cb6f1b7d22a32e5480750b6185b7a76a476270a. 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/QZK6F2391825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6124468d50df55fb374baa73b0d4e55d2948d858cb6c401362945a042402671. 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/QZMEQ2381979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457e9be21c3fd22880a7286c0f144f108fb9bc5e569dc3a66154dd5c24cb9966. 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/QZTAS2378759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfa1cecb21a1229891a5260790bfcd389eed41daa833082df9a89889c580b2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ22424710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fef7442015493308ff431019e2672f072d9bc078a914a7886eb45a4e6cb7dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82289795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15788b48058bfc71e61d0268051d6644e981798903e3402ed5a4aac31fed207b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2249174.