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 0xa7b32b6cad6382bd70e67a2f9ce18aed1cc39ce098108ede553fd8f91692ff56. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d958b27d-c46a-4684-9aa4-24eef1022f78.json and https://artists.proofprofile.net/proofs/artist/d958b27d-c46a-4684-9aa4-24eef1022f78.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 0xf22ca58c5d61d115860bf4d27b776339811ca1ac3c49dc2e9c73d7127bd88afa. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:32:17Z), 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/ING212322295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f22c0b176686501bc8192bd8c04793ea5683e3b9fd226159a6a92ed5f837ec. 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/ING212322301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6197da49e88b91900e8c78e0ee6bc2dd1f5ca556c248f600aa355ab8c911f0cd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:30Z), 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/ING212322309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673105a6f00b732aa3a3da3b5597ebbc90fd5d0912cf497c7f71bab085948eb. 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/ING212323753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddd0681dc9728336dab2585e3bce49fba9a18bae99e556b26dbdb9789993417. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:56:48Z), 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/ING212323869.