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 0x3de07350e50773c3aedf35ccf702102fc5c84644a55335955ad887e50b190ebf. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2516deef-1079-41a3-a8d0-cadd7958c00a.json and https://artists.proofprofile.net/proofs/artist/2516deef-1079-41a3-a8d0-cadd7958c00a.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 0x3db79e926dd33bed93aae48692b71ab199baf3766a7de11f07e0a4edee90320b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:40Z), 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/USSH50388025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8e07da7456342b4d0ff69a176079f0272df2f13f856cd48accabf5862c9a8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USSH50185782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c76928a858e4c8360c5cc79a13e8baaf27971ceace4b8db71506b1bed7e9a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USSH50185786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819ecf0c896e5a5c460aa269a4f057d1e71c6b458e0c501b6d9d42b4adb4c1f9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USPYZ1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627549f7e6146f0608f58d83779b74f3879716fd704a7d330030e97a2d5ab60e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:56Z), 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/USPYZ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4fa54d3c432b71699cc62af6852ad4444e6e6f97c8553ba556d9bd5c51610f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USPYZ1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69ffd2cb2681a96e86aa1591e40688b63303f82451238157a8578bfbc40cb1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2537173.