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 0xa12a06b85f501c1ec12602437175dc09c049b9f53ab963e394aef133e5c22813. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff0ddecf-3e9a-4afd-a160-6b744ec966cd.json and https://artists.proofprofile.net/proofs/artist/ff0ddecf-3e9a-4afd-a160-6b744ec966cd.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 0x560c05c4652bc3bc388dcbc5c08ce66e8f3c4cef38e0232734167b85bd4d4de8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEP2251483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1899c0c925412c59084b8887516c4ac67997d28d7f4d981bf53ff1c63c480b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB82234721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ed6865b10a4249edeb6b6600fb00925107384296e741ddc36244e128d51dd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB82234725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a65cd0829006d52fb91f59ba38ea7a0db5f74589b609c6734cf26cba09c0126. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:46Z), 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/QZVEM2398942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21dcf33b39d3b8e8311d111c0ac132baf798c7e5d0d965a9b762c4dfc760e21. 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/QZVEM2398943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a307148968b3afdf77800987f08ffc675bfc4c3ed242cc3495f700e14e459. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZVEM2398944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b70eee32572eaaca89fe203caab5977a760b49c470209482f661c48398fccd5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT2VB2465279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3efd6dd3035dbd434add8a8ffbb23112cc2f4946873346662c6e9095c0baa1f. 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/QZVEM1849067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a1b49ebfd9d22c230563131eba3aad8e4560fe9b7e5738deb4c7319c9a077. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZVEM1860904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cf00c3e22f34627c235321b24a8bb7f5c43d27954bcd95698ec92c1d8bf322. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZVEM1827487.