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 0x99e3494c69703fd9865c99118265d375ae176df6a7054c361a03b4bf36593754. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbc8b04e-d2db-4288-87e7-62043e05031a.json and https://artists.proofprofile.net/proofs/artist/dbc8b04e-d2db-4288-87e7-62043e05031a.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 0x77212e8a72d97eb58f1eea55196746ac8231778e54910a804b087607f69e9efe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHN2243788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe044aa8d67459491391e525784f93f73f487357755634939d60afd32bc7ab0de. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHL2279708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f7a0474d560ac310207943d875a972df538ce1da4bed4409826a820a7ab28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS652264562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3974b039efb9eac9a29abfc89cf0050b5ad97930ae050da1591613d8b876e225. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:10:19Z), 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/QZS652218301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051eab92953223b59f0a51deee7a67554e2d5d7a7adae3225bbe37debcadab82. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:41Z), 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/QZMHN2226798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d3b8a84d69b9f8b6b8b2d51ef73ba489483cc5acca23ebf4b05b51e55995e7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:42:22Z), 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/QZMHL2293094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64262c0d53deb569a9ee4098e7295992cf531b3586e9edb57619caefa09e079. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS672271479.