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 0x12f7c79a0fbb6287e09cb0ea581cbc561124fd03b0a87afeb0a04fc1d0902983. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73253c00-5cc4-4b76-9f52-8441a3d98496.json and https://artists.proofprofile.net/proofs/artist/73253c00-5cc4-4b76-9f52-8441a3d98496.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 0x507de8708410850eaedc8e0c19ad4c07e407be8db3100cf3645037b7c678e513. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:55Z), 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/FR59R2318912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb63b888a7f195259236daeaf87acecdee1a111c50ca6793f7c6e0ccd46a04. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:20Z), 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/FRX762434498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b199781ff280c291cf5e8ad5a0bfd2f446d3d853c94298a70fe5f431716113. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR2X42563474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855fdd06cb6e1a8ed5b5f630689e72b0477da75a3ddef8369d5e1766dc9f316d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:01Z), 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/FRX452546508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eafc77739d17e6529c2a4a3d17d65d16ce7faba63a1a04df7b245b2098ae4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA062521126.