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 0x9b7c2d9f831bd028d575b1fec6c365da13a1079d1d58e71414836cbf6b93f5da. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/166983de-b882-408a-9e82-94c90af767ce.json and https://artists.proofprofile.net/proofs/artist/166983de-b882-408a-9e82-94c90af767ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
0 = EXPANSION (Feat. Eric Harland, Harish Raghavan, Walter Smith III, Michael Rodriguez)
Still. (Feat. Eric Harland, Harish Raghavan)
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 0xbcd97f1f141e6502ba1dae29c6e26262e53550f9e436c52fa408abed5f22cef7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRF412500051.
East River (Feat. Eric Harland, Harish Raghavan, Walter Smith III, Michael Rodriguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7319683f31f881f1f07799b2486adc8d0e3ab4c1d64b83b48aa8b977c7cd8f74. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRF412500053.
Expansion (Feat. Eric Harland, Harish Raghavan, Walter Smith III)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55066df65e39f3d8013af6230b9f3c1687ac16ddbf3e93090344547fde0df2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/KRF412500057.