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 0x0ea8fc53370fc0b7ea187b84f22ebed784cc6cbecf98bb31db4f955cc334c409. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa4851d8-5505-4f07-83e7-5f1793ba13b6.json and https://artists.proofprofile.net/proofs/artist/aa4851d8-5505-4f07-83e7-5f1793ba13b6.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 0x3805f41708a20a34a75f691f9507f4a11962632fd4461da8371a59410cbb3b47. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:52Z), 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/QM4TX2532317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346835ee3c7bed9d193047bab4dc916da576f9b2c51da4c6de7d7ea5f207121b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM4TX2532319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedd2b0aa455fc04884b6b89fa14a874992365c65f3c400721f6a04d544f5ae9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM4TX2532320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceb3eced7e648d0bfec8a559d1d3ebbeabfb2c698e300908a40caf08c043b8a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:30:27Z), 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/QM4TX2532321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127eb2097c062a473fc3d9ad77f44989ef5e7e66fbf6398322a63bcb1deed4f7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TX2532323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445faa097172740ee923a0cbce71988b0f2e9c88f4991f3255e113f7d4c59f2f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:45Z), 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/QM4TX2532324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c37ebdfc295813bcc6b4a28b88557529e881bb705acf744322ea6c927f053a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2532325.