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 0xacf39704ec77637da0a88e069202e7aca84ce61fa775d01176c2793c5628e126. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0c0bf8c-59be-40a7-bb5e-eb42dfd046a3.json and https://artists.proofprofile.net/proofs/artist/a0c0bf8c-59be-40a7-bb5e-eb42dfd046a3.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 0xb1be6b606af06410fcd7872bb221940fb8d23db0ab4b559ca3709483084da6c8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:05Z), 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/QZES72548879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a32521933b1586df86fe33c519d30be16ec425915ff50aeef829efebf0f678. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTAW2585371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394669890334c60bb816f23778e73d96f2fc1921ad79ccaee985e750e9d08266. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:15Z), 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/QZTB52533742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17d12e6c5e0377e3f1ad65e0f5e81cfc05b6d175d817d5a71381072677c1df1. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB62565506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dd93f6b3b3b346cf4a7ec2cf787068de9a7acabd60230e0059e90a66265940. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:44Z), 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/QT3F52553332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00629a064f527aa7c5ce58754b33bf1f73a85911a68e66797823d931104fe5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:45Z), 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/QT3F62573235.