1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xeab9cc849f9323541215fd3ed997c15984941827c525fbc6d5998191f852d60b. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ca4e8f4-a801-4fa0-a747-ff025bc2f969.json and https://artists.proofprofile.net/proofs/artist/3ca4e8f4-a801-4fa0-a747-ff025bc2f969.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 → block OTSBitcoinBlock must exist at that height 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 0x38b2d772c598010e6ac704a9eaa7e863643540e08fe5778ecf1d59d884f70406. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLX092100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193c53d954ce77478c677e58a0417c3c4b1a29fb820e906eebf30ed15e2de84. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCN51600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863c1bebb1702bdc36b0f628072b6b28ae20e94e91dcd324b39386aa4ef82996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLX092100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0024c993871ff0da4b57b761042236f65d6e6a17c41e8c1bd6cbfbb1f5dec8c4. 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/NLX092100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636e7748a055a68f67519a1ec5aece6fd5e2835b8f128a749d9d9ada187c490. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLX092100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094a9b80c22fbdb11bf82665a29ed485aa277b92e0f836591dd23a6bcf73a7d. 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/NLX092100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92b8893f088c096ca20f1bf6e01279da676b0b353c3edcb8b0c9b5403b7ee9. 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/NLCN51800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b10bca35d765057f6f354a799b38d8d8e38f320703747904c3dc4578119d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCN51700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e539fbbd6f5c9f887cdc8d6971003b755f15b5e5d1bd70847c8bceb29e88d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCN51700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb94a96f8a8a8833e4a45d8136e96c1fab693ad8bc55d680243bb68a73127b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCN51600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e2f31548760ef0fb9f3dfc7b4f0891e791222ef7fd4d0beda753a2448821e7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLCN51600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097dfbec329a87b93875bf9a2563e4f0de1a5a741378c1d2ca4f36a392a7151. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLHA72200046.