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 0xc2e6744a843b59509882227b88a3aefad7fc25bde60e38e09bdda6486816493f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80d18bb7-09cf-426e-9ad4-ec654ec1c5b0.json and https://artists.proofprofile.net/proofs/artist/80d18bb7-09cf-426e-9ad4-ec654ec1c5b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Day at the Neighborhood Studio (Tony Walsh's Musician's Woodshed)
Robert Christopher Brown (45RPM) [No Smoking in the Cockpit]
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 0x483c22082273302e6b7ee7696ab8a728c45dfc4bc52370c1a6ba5545a661c23f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USDHM1819092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bc77bc75e15e67229dcbefe1097b89ed434d5bd25211553533f65c9d010e7f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USDHM2410573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43dd2c760dd303aa029a77ee842b6dbd67a81b4a7bd9eb2d41f70043121bb2d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDHM2500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ae35014efb5ff0c4723fae8a6ac5fd685fe89652420091b7015ad12ca2e8ca. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:12Z), 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/USDHM2505299.