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 0x99497a71973a4249e47cfe69183a2b96f0f64eae16a78eea8b315b4ae71a5f3e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d3772c3-1d07-4697-91c6-a1d7b4cce655.json and https://artists.proofprofile.net/proofs/artist/5d3772c3-1d07-4697-91c6-a1d7b4cce655.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 0x3475da66a5957bc205a0717a8b8c9232ebb2cf648ce2e2e7b0d15b55614d7142. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:52Z), 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/TCAJX2572538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb9908b7f5c25ad4c8c7297a49428a8902c33bcdbec466012dd8ec19a9dc11. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJY2515656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e917fd827e7a9df2bedacf18722477d14201fd2306cdabf924cbbf30b386f9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:17:52Z), 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/TCAKA2514892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c6b0f996ea9b174301174eda218b7f550db0664a0a9bd0959a8c7a8a65420. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:55Z), 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/QT65X2585368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb2fab29ad7936b5748836440910de764369f94a97c30be015d9195f3f43be0. 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/QT6622505443.