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 0x8d31a395afb9d00e8320e6b139c54916d8e38f24aed1d27eadcc03e273e5ff31. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a48791b-b5f8-4c03-b5dd-36533e652f55.json and https://artists.proofprofile.net/proofs/artist/3a48791b-b5f8-4c03-b5dd-36533e652f55.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 0x68c5207ba9064bdea04c3b0c2fcacd2710c22da3670c908bfc3f35a705f86aae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:20Z), 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/QZHNB2448244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb0dc4f788e0b543bbc678b519fc5a18f9b547092a3f1ad641ec6dfb644b8c. 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/QZHNB2448245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7258d76bf898768038fe24edb2d49cfd6ea705d521c6b3e0ff8228af6da5e008. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:56Z), 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/QZHNB2448246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f97a1f693a973896d32ea19904692192ff6f281acdf4a60e8f09d95b26268. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB2448248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc465fc675b15e2d06ea7fa16a0569318a285058c49a5fe43c3b94a0c174c4cd4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:09Z), 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/QZHNB2448249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac107705f1b52df75254c132552af563404a25a2956be0117629b3f22757a28b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNB2448250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740ed9d4409d48da84253036f31762a8c4f0c630322d57a6ddfbab91706991cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB2448251.