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 0xe4fc75ea42d2a61cf047da7442786d0a7977edf16ccaecc60dc9abd7f56a8cdb. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c63b3ef-c5c2-4d7a-8f02-532e11714ac7.json and https://artists.proofprofile.net/proofs/artist/3c63b3ef-c5c2-4d7a-8f02-532e11714ac7.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 0x053948d70576fb7d1e98afd2dd7088c6fcb46e25cf430bb042a297b56eccc7b3. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTAS2444471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d277776ddc33b62ff57a27128140e8a0d7eaee24bff1b0ff0554ca1eb0cc94. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:38Z), 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/QZTBF2496218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ef383c252027ade7071dfd74334982f94c57acb814645fd3f0421087992086. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFS2455851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf83187b733d4f3462493c9b8dee9d8121b10c1a60519a7ca01e198639d4a4ec. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QT3EY2445795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0605057d2bdd08c2d745741257bb1ba315389ec05882f2b680a3700273600aab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12511816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58331f2c6a3f9bbe6483ef697d5879a46b1ec19726a99b60a0fbe4c7c8c4691d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:10Z), 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/FR9W12511821.