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 0x259777f7146b9a0441226cf28f24d6cd878631e55406214db1bb7697db3c5d92. 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/b154628b-da8d-4ea4-bf29-da174e639692.json and https://artists.proofprofile.net/proofs/artist/b154628b-da8d-4ea4-bf29-da174e639692.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 0x50515a206d17e1b57011c14fa88abc4c9455066557f9cf64e0b7b6fc9454fb2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBEYJ2467302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1acd65778d17166abbd78a57018178b799bd60a80ad925362d37557aa90a2c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:21:46Z), 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/CBEYJ2467308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cedec17574ced05b85146746bbf11ecd51ee56dcd0cd533d541d8d1d4e40019. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:02:37Z), 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/CBEYJ2467326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c531a4af439e6fab9986d61f13ac78cffe98b144c9baeb12eca5fa5de83b0c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CBF8B2480215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dcba52e3d48f48c57ba02e4b96008cb8a780207671805e725341c1dadf4dcf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAHQJ2517513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a83920fee002e32cbe7799bd7a87add82d310541aaaa9bf56cec3946c82523. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:18:07Z), 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/CAHQJ2545814.