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 0xa741c6292ced531bd11cb7751c7cc062e115aede432f72b32342aca104ae43b4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3225939-d73c-4f30-9e5b-4f955082813f.json and https://artists.proofprofile.net/proofs/artist/d3225939-d73c-4f30-9e5b-4f955082813f.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 0x249569e9f96e19518b4ca24220eb18702459c9fbe52aea0afb2563151d549a26. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:20Z), 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/QZNWX2161667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516812524afbffe746867116001298caedba211c088eb083bc2110e44023e3ef. 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/QZFZ32203952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef75021328f117ed6755330b4cda5ac5391bae87ca6f26517622d8a51d93c8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:26Z), 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/AUBEC2228241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ce6ced9233ec05810930d66cd97cf943d011d5b25b10d7f42526e57d97709e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUMEV2332853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2365c51a6b6a6726481135164fcc79c77a2004ac09250189ec1d7af3645538ee. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:28Z), 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/AUMEV2424796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605e5071736080923f75e9c2d6c4685f38370d03056eae5ace0e9031f6d3224. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUGBT2411231.