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 0x8444b41a059c3c88ab065ecdbcccbc7f5851c7414edf558860f4fcdba22df225. 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/2d3becc0-c9ff-4466-8b1b-3d16834d4c67.json and https://artists.proofprofile.net/proofs/artist/2d3becc0-c9ff-4466-8b1b-3d16834d4c67.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 0xf315c08ce3aff3ebcc56ad864ef8a32ee98bad30a25f5a3ecaa2824aa607c6c0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1315827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640dd022ec2d32fb3dc374a9be3bfbb1531600fe1b9ea5d390a4ffc0b8c3c178. 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/USCGH1310700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc612f4cc9f61177ae0650b8c27b39ca514c053878eddd86c527be20146803b5c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGH1552417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698620c9eecb4ac9c78a8224e79f1d1c66c08d1c86fd8647cdb2149b2bb88ac. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGH1552424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda02d427be375c96e04822ea4f90f4533e4563e61f3b0b0b3e5f53c51b79a9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:48:13Z), 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/USHM21588681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae6be91042b78bac4025ddd606a33ddfd4f1e0b2c849c28bb64fb628650d094. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:24Z), 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/USHM21588684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7332e505535ea23d34dd782f6b864f601aaf80916f2a47049c640654390a3a82. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDY41703564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282a83501d41f87c9acc734dcaaa05b3a754847504c22d01306d70ea583d5ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDY41703568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2cd6fd89538e3b29b047b1ba22f3be3ec922e3d93447e834d5d0730e850d8e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM81723982.