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 0xf6c9f8af452e63ab78ab0997be48bb34a3e72898531749298d0e4ba28015ecf6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc7e86f5-2300-459c-8784-9fb9185045e5.json and https://artists.proofprofile.net/proofs/artist/fc7e86f5-2300-459c-8784-9fb9185045e5.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 0x12af0e2e3ecd6156e07f2477192704003a288336a4a7fadd031db2fa05b59f60. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7S2431349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5d28611064ec104ed0928550a2e193b416254cbb3e7783e941874a75b12898. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:08Z), 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/QZZ7X2459666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542ac96c528ae7933240ca48dc3c7d6043e802ee140d88fc5f6a00c0388d3211. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ42584796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066c7cbd781067c38d2218b1b49ba4d69e68444f47bd144ae31951ba9741d8fd. 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/QZHN52504129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b803ebd765a138cc4456348721bd2f035fb3df96459aabcfa782766ecba4336. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNB2572822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d99fcef3b4f7c9ad4140235fc1e795f4532a19da90b6b238cbf51a9546126d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:12Z), 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/QZHNB2574323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fcc533c50e862a3d3e37ad06169d9b52aa6a5d4996edb2a85d4b34a0a5f147. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F72552168.