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 0x4c1f3acfd2dc81ebf7764790f922c7577cea1023641bd524cb035eb3fdda21b1. 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/c756fc8e-a22c-41a9-af12-fffbd808e430.json and https://artists.proofprofile.net/proofs/artist/c756fc8e-a22c-41a9-af12-fffbd808e430.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 0xad3a6137abf2550a7ebb2aaf84aaff35fe62b1931d771d3bf7cbbad8b5b521af. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2X41858535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5fb574cc4354b0627e42eb471948a4d25a30c60afe1792e73ee263ae8813c1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR2X41858538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae935d1e32ed27e5e55c3f225568e5ff864f27cd17c0c3e114849e59c9904f8. 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/USX9P1155711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef880cdc3d72b9038cb590cc5b070ce0ac923cdc1375c7619099d1bf7c49e49e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USX9P1155713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94460e79850ed3969e5fcca99293a2ef5a2c783bb153de7e28ba71be9c5fce0e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:19Z), 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/USX9P1155717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85e0e8a44a924e2410eb3c8ece06e3351911b0b1bdbcbd025cb63d2cbcfb7fb. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:43:23Z), 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/FR2X41862108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83e79b21bbe5dadc71b2177ba8e4b9bef0d729e348e81b6dd770d74d88d9dd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:59Z), 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/FR2X41862113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa24d5e0df1cef29e3500bd747faa8092157401d4e6d1aa2d53010f3cfb3983. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFX2101404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792223519f34f6b82ed0ada8f5c4c7c4d974ac3d32cd1fbf18f9a1ab7fe2ceff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82523458.