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 0x721353f8b7ef3834e019e61073d3f5c07edb9bee6e51a368f8a5b37c34d2a955. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7247f9e-20ab-44b3-94be-acceaa267c0d.json and https://artists.proofprofile.net/proofs/artist/e7247f9e-20ab-44b3-94be-acceaa267c0d.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 0xa6bc717173efe9d365493bcf6f7f0b2bb6588d2bee14228c6de7ad794a9856f1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:35:48Z), 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/TRBIP1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f00b656e3c41a886b2775fee90c18d079f8153f1a3a3e3522cd00352dc77ad. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TRBIP1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea43e65b44ba6b341d89950f6e225908806d1501b39ca98d2238befc6d0c6b2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:51:36Z), 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/TRBIP1800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f5d1035f3389b908f81319b7fa30b5ca653e3a00395204140a4f2714efc968. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TRBIP2300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac330a341ab6d8e51e5a9d19144667edf3480bb901ad1ef96fbdc69c5d0895cc. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TRBIP2400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c2eb540586e064f3c671573f405cdf5b175e4a247ce16504e4fe9b04f612b4. 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/DGA052015776.