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 0xec0fb0f12c365c172444e995e6f81924f96af331a67d986e734ae17a3f4e1100. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e56d791-bcda-4991-9be5-f28a7b0cc98d.json and https://artists.proofprofile.net/proofs/artist/2e56d791-bcda-4991-9be5-f28a7b0cc98d.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 0x32ff39d8da9f7e87cf860fa8c79e5b796cf328f8754c95027c9230d877d70875. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZX2A2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966321e5a06b2836d73fc1d28ce8710f1db5dffb7520b3e898c77a941ce115d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZX2A2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f77be299ab10436f6be0f27e92e0566b740db68e0f85db12da1eea783d837f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZX2A2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe4a3761b964becaf0afb752990f469b32e85288a9676738e96bcffbdd2fcce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZX2A2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c6c5430e2b6dc86b4a7548f72106c3a97647d54427edbb27d460ffc17dcf62. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZX2A2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c41eda57ff9aca7a81552197584e2310bf442422b82d1b6d688a3edf2f99e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZX2A2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f3d1d30e9dfe8b4c7457f615ae607b0ef42c49a6927a9a401d6de0e7a16473. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZX2A2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49650cc4f7a77a27e92c4d821618c57a61d41cbb64e6679a40ea2996d75f044. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZX2A2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db0b2201e6205761bea71afbad8032843c6f113c521180e0f6fe2520e686ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZX2A2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9a7e72a7912ce952ac806261216bf47f1debb19c3096b177dc85e477a2716. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZX2A2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e317a4215b6083574f517fffb80190e5e7ba79f1364b9ad495988e7d8556f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZX2A2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8b19a1fbfa2d8757d79adf9722cf8fc0031a0d7b6848e6bb16eb8548e6c6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZX2A2300015.