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 0xda234d53439946871b15ff578d15d696fee157d9ce646a08c313c34f7f03fc24. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5713721a-75ed-4425-be79-d4a35cc5f724.json and https://artists.proofprofile.net/proofs/artist/5713721a-75ed-4425-be79-d4a35cc5f724.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 0xa0d73417bfcbe3890606ec75383d7a55ff88fdd0885cc01d016fa8dda7f5d863. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDE2576500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e169575ba76215e6b0c40bce930345d8ec7bb8ec2912323bb49ef1bc0f9e30c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:37Z), 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/QZWDE2576465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32be4b0e3fe15f784ff2091552a11625eeeb97f7a4a13b4e3afdce3c7c8f9ba. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWDE2576518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a532a8ab2251dbcb6ce06af5d4072a0ee482ffc7223288d7c37f4ff6ddcc13a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWDE2576476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbed3fc9e4382018d132298ee97deff35b22ef952c4ebd57788f50e6d53fff6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDE2576457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe827aacfd9820caa26ac5815b9daf980ecd978f621c06c3b08ee23d299535d0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:13Z), 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/QZWDE2576471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f1d5bbde607b9df0f6441973c346c57817f1094e706d810ed58408ed7edc76. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:49Z), 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/QZWDE2576472.