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 0x0978ab3f0c656fc52e6901d0451ed9735244083f9e457527a48cc0acf627bc99. 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/d0ec9a09-29ef-47e1-8917-9b626034e8dc.json and https://artists.proofprofile.net/proofs/artist/d0ec9a09-29ef-47e1-8917-9b626034e8dc.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 0x1094d58ed264b21f2e85bd0a2e99dc6ae358f6005ab7ffb75216932c988feeee. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:36Z), 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/GXD7G2209324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5fe874a6a4e445a52cbc8adbef393141cef6bfd75b7a15c09faea968a5ee9f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:49Z), 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/QZK6Q2580064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf718c1a3482ddd8cf095b932b6a12887231c0794aaad418bed52221c1616e6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:12:43Z), 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/QZK6Q2580066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98ad5b8034ebe6a7e1fc3526bf28e904e7b2285f3a153c3ba10d194b8117e3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6M2581681.