REDIRECT United States Government Accountability Office
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 0x964f84f4326f0871c29e61a7bdbfd8ad985b44307d0a8b0f08ba660fce4fb7e8. 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/e1502a44-2e0b-441a-a44e-4350da68c8a9.json and https://artists.proofprofile.net/proofs/artist/e1502a44-2e0b-441a-a44e-4350da68c8a9.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 0xb173c6e91e09bc4969b07c7fffb8cd728a049891758f807017d13f081c5ff803. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPVP02403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59276ee4d748508bab9af0d71d9b0ff03734889fff62df819576714eaa9b5ed. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:47Z), 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/JPVP09305301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2999d3d77d751460b9d17b1f3f5fb4601a252460baec9ca9d5bbd7094c98713. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:26Z), 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/JPVP02403701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd5b11d48c59e48886344a5fda4f5820db2c23adfb7b1fcda6187735be9b51b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:00:28Z), 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/USCGJ2334654.