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 0xa9ad5e547cb007676c4fac04070cca40ff033bc232522241e9ae9f4fa60eb41f. 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/9eff60ce-2b3e-4adb-9013-9251f2ff724f.json and https://artists.proofprofile.net/proofs/artist/9eff60ce-2b3e-4adb-9013-9251f2ff724f.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 0xac75ad7a56555559add77de87410877831a856be21034b759aae2c234f3b190a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6J2186267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d74b54bcd0a4ac7cf86f6572c1c5ddd3de890232fa86695aded159b3e66f4a9. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN92311618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a51f215e3cf0ffbb6be90b08d432bd939619b3167889ce075ec4bef4c57bf. 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/QZHNC2357440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5703c51836c57e266b8c9a1ee6531fe2dfe3ca9a637900e50bfc047f533dab5e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:18:15Z), 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/QZHN72391803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648f7c0b696d19e94db3bf9f3b33204586f1193d35031c5cded9a41e5649662. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:37Z), 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/QZNWU2429685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4b553522741cbeefbab9a1d9def7ee31a1edc22dcb0b7151c7535ece7f3b9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:23Z), 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/QZPLR2404305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3f826d27589aff45f550e353f85dcea6240f391d995ca3773a1147138cc31d. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZNWU2429776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7e11083183d4acc593b8233c64b46c2e67536660dcbfa5a605e33745c1a880. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7R2454712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5fa585cc954248557ec659931c42ef6c94a61231169007a88ae3669928364c. 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/QM6P42447248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5fa585cc954248557ec659931c42ef6c94a61231169007a88ae3669928364c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42447248.