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 0x955f448396f34e49685ef339e8404efad7ba8051560555f39abf34a9aa066331. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bab7d32-380f-456d-92a2-7eff7d310feb.json and https://artists.proofprofile.net/proofs/artist/1bab7d32-380f-456d-92a2-7eff7d310feb.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 0xc5a2df03381e5165d54657688000e862365768d3f45783d5d5fd19f8c6e878e3. 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/USHM90519961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799bf88c59a48d4c93b74a30803af2982fd037082d8c31a0a9bcf7eea6d97335. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:44Z), 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/USHM91060191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1515dc6fedee07b9518d3e782ddbed732d007142b92d33ae6a1c7e5f2b509. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM91060194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d5037754e595f81b408e21b9c821bfa5bfeffd165ccc961a9119eff923f3f8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM91060198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23056f106b19d0ee129373fe1ef9ee7b3a7ffcd2a6b343264378f6fe68cfb8f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM91060199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a759efbf16cce692a733aff5f7a3e1c5bb4d9f0eab920fbed94f8ea7ef8be3. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USHM91060204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b3b36caa8cf21b6c7007d34bfede7da80f7da2e71499afcaf2c847707571c6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:33Z), 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/USHM21157487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923da28f68013237a549724d7d3f0bc7eb271972d5a50f3edfc9d9cf55991dc3. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QZY282300001.