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 0x01f0589b6ab330de74befd620ff7c7cfa5358ad70c01c476cff641623ca70c7e. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72aa1548-e061-42a5-876f-5f2983f829ac.json and https://artists.proofprofile.net/proofs/artist/72aa1548-e061-42a5-876f-5f2983f829ac.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 0xeaa010cd8c393ea4aacd4e939b52a685fb5f2a60e5da17a49c910d9542e62036. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:12Z), 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/USCGH0847729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd630cfe49daf18e37744defde0ac273d2223b2b5acde64d902c4b1bb77b70c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH0847736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e46b77ada1e20e38704d3d7a5bd95e2c5e999c7d032db64a7303fb7e109c3e9. 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/USCGH0847537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20bde213110752dbb02de4ad52f0d8c2d265f066606790037d65236896b3b8d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH0847547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e720cbfc9e5714cf8b075bd223ec602bf8898aeeacdc7d975dad27bd47d32a5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:28Z), 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/USCGJ0855393.
The Burtschi Brothers and The Mike McClure Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84e4d5755c9cae38a1e93ea656af31f0ddbd7b1e2145f798c0e0140f53c8864. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM80949501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8603eae421fc0ff459ca64fecec6cc333d2718d0043ecd85eef8a046dee4e8b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADY1847676.