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 0x98a8b42e1260ea29b0ab98bba9f52ddfa87a10c2a11af763b41df5a9d3523ca8. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dff50e5b-3899-4ed5-8c10-1e3938c2c4fd.json and https://artists.proofprofile.net/proofs/artist/dff50e5b-3899-4ed5-8c10-1e3938c2c4fd.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 0x3ffbbc9cd61205c65c67e37fca3ca478d89229ab59e5d3b7580868d754377924. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82465045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a708c8fd6f21e40cb4697110ef4edefa53eba6fc9d85e2711edfecdd59d5b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:33Z), 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/QZHNB2477722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc87f1537da734c311193e7010fbc2425604aaf80d43bd4aec2a2fbe2fdc6935. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2446416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3478a6b1014293be0e84e54c0fa3dcfadd0c41d0704c9588cf3c204cc30f2437. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:19:52Z), 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/QZMEQ2495451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f205818d3c3eab547024444d53efff458a2663ce573c5205b1c171d31715e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42442747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e99935a7992a1ce200294e91ead22d08059bbd5565ee3c53965654a7049e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42442748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a18390a708c6b4313783e86deba0d961e96f7d4ebde1669a4f8456bf118dfa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42442749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c577f5447c211ded7be368bd9b665cb02b2e9fa66d563aed0a80372aae8fc23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42442750.