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 0x0dae091aceaed0f991d3b8e7311d5e9545057c7fede346596d58decfe07128c8. 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/9a8e4885-f375-4262-9114-c972e9661f0f.json and https://artists.proofprofile.net/proofs/artist/9a8e4885-f375-4262-9114-c972e9661f0f.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 0xedb7986a4ef3f1318324c3be7a6d4169503d424d8b38912bff737ad2b4f2a0d2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAER2028331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c000adfc642f535ea9f1d27ff741fcb4803c6fa7a9bb66f5af0dffecc3f7f2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAER2028333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3645a977217cca4663ec1deccf3b1faea7a5d76affe71a4c68c9c9d075121. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAER2028364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdddbc0f9bb0fd77d76736e20c114644af8a52446ea62ef5148dcdccf0c4611. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:28Z), 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/TCAER2028368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20034c5afa6c24ab480b8766beedd3a87c8a1328104e7c9f8659f5dd43e9729a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:05:19Z), 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/TCAIA2446963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91f29cea23f9613b0357f3cc9c90f9f010cf9e975e69cd88a94a1589864f23d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:22:06Z), 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/TCAIA2447049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866757526d4dd1d63db88c6f88adf2eabf4d16fb01ead474e3fbc6062347c2ea. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIA2447078.