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 0xf4444492852112da47f56a3c484cf8412afe3fa10bda143de16f85b489dbe5ad. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1918ccd-a2d5-405f-9d6d-729d6210ba26.json and https://artists.proofprofile.net/proofs/artist/f1918ccd-a2d5-405f-9d6d-729d6210ba26.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 0x0e29bac9c9ff96bcdb5e186485a1bb31dcf672cf8e4fa0060c0516e1b6f0e7e7. 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/GBXYY1400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886335a977b47db3ffc2e4c7a132bde43da45bdf60d3ddc81d017b0a5665edf8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBXYY1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105f3d6c8cae16f30c24a8a43bd87ce367281a365b9f48e6e969c1c8d9eb098d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBXYY1700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458bf8470e2b5018dcffa546efafdd0b9e11a36917d405a1108827f74fe9f091. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:11Z), 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/GBXYY1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3061b55d644346f0259af38439c0b3284b298cbc76eeaf042b55f1561acdc20. 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/UKAUU2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc267fbbaecf4004af8fadc8d5982c8dd65b563c7f4e7d5ad49ec88ad10aa7639. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:32:38Z), 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/UKAUU2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427771e186e07a0e0babe594683ffafcab6a2b43f15d18a43b87ac28fe23b935. 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/UKAUU2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b51ff997385c6268527f1d2dbec6d7bfc3f55e14de2958ec0b22b81980c57a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/UKAUU2300010.