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 0xee19dc29d8d985cfa41246b4056864da9a4fab5ba91b970d924c34e901ac5ef9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1e0d5f8-dcf3-457c-8284-86daea9b1990.json and https://artists.proofprofile.net/proofs/artist/b1e0d5f8-dcf3-457c-8284-86daea9b1990.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 0x2a77de533368c6251560476e907cc3db15a5532d8199921edd383c93dfce9bbd. 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/USCGJ2039090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8270b0efb9dd2b2a60fd77cbb8e2f72db65481eb571060e2412c5ab8ff401396. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:21Z), 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/USCGJ2039091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d65b7687075b41bd201cbba41c87ea67b52af89753abfa8cc7b1cd48919b8cc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:54Z), 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/USCGJ2039093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb84247d49a3adde62eb8f25ff69dd3944579b02ac0ec8ec5abb6886dbc871a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ2039095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379721133eda9625cec10a78815efd151875f34f18cf479d79e7186ab7bfa78f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGJ2039096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8802f8bb6511801698c4691f9bf9c55f07884f0e2938107f9757a29183f23aa6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2039097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80b5163ea01eb58b0afe5620d3f9d5382050fbde46a98cdb8a2017f3813ea5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USHM82293784.