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 0x70467924b37c73bc0e52fa12fb09ffc8af7d161c4c5f287ffc67ef0be8e91219. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db72a0de-639a-40b7-b84e-d5f81ad3cb74.json and https://artists.proofprofile.net/proofs/artist/db72a0de-639a-40b7-b84e-d5f81ad3cb74.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 0x7e2331efe1693b47e42b6bcc65f95a834d28adad77aadb661ab3f22bef050298. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:44Z), 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/FRX872176015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211b8949ceab9381105c5d7dc7e44b13351b57d4665421583d04ea1cc94276b2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:09Z), 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/DGA082380383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f962d3addd2faa6b3afb57609903ca44732857d10ea5d74df75ba369e0b98. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:51Z), 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/FR2X42400991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6fc52cb6a87833dd3eb71aca96e1d03f39c5b941d41710f1675e1c0cd4fe8f. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/DGA052447083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18058e25857b26db21500db010ffb11809d109e1cbc3581ebd398114b3663a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0M2493601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09640a0b8785595f74e22814893f7c0f4bd261a25ffc3fb2ac3828ac57582a. 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/FRX282511792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9ee256511cf41b8d08aa902e8eb2df2ac4c731b82aea32cee387e1fef2b645. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DGA062583519.