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 0x574762af63e06c75cf3f62719558e7e0e3d1fd639530454aae983afdd63fac84. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab3a2c66-8ba3-49ec-aa8d-b1c07d9e04b4.json and https://artists.proofprofile.net/proofs/artist/ab3a2c66-8ba3-49ec-aa8d-b1c07d9e04b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En Concierto (Sala SCD Plaza Egaña, Santiago de Chile / 2022)
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 0xe2e76f2a2b24d142cfbb59442657c56fb1af5bc865463ea2a1f07c0603efa198. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7T2426497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c33966ac74d599d613b081f694edf0fc05362d41d2a1c0f63d0fb45a5869ef. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZHNB2556312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5cee8cf0e03e5d4f83061a75cd0e55dc7e3b8ad2fbc49e9df4100957e7b12. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:44Z), 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/QZNWQ2533945.
Sealed With A Kiss (Sellado Con Un Beso)