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 0xcc4cadb31690c5b62b5fbcbf7178c55b766b3e0f145e63f6185bb13b3cad7050. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e15c047-c384-478f-a89e-9512201e5b05.json and https://artists.proofprofile.net/proofs/artist/2e15c047-c384-478f-a89e-9512201e5b05.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 0xb27c478915c3b57e29289daa74a05206e12247068efdccc00cb65c09c8760650. 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/USHM82170740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c1be69b5e30242d374c8301432f83abd0b41ef9ac004222491020d6b37bb6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:44Z), 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/USHM82170741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1578625f9931346c827ddd66c2c8639798efb4ee66b40a1e17f006a83d09970. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:13Z), 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/USHM82170742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0da4e08f8073ec53c6fa36c1c9b3b0048b116607ca67fcef7268ac3cfd3e18. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM82170746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97120cc838ef8bd5d08586dfc932d46249a9d3bb0850fd6ac39e5990ceb5eb4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM82170747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f85ce8b2d36cbe8e5d9a79f1b55e4fd4884d99a63b9661ee70dac55f925840. 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/USHM82170748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba16e22f1cd5aa1ecb5545fd501606634c34b682f7cc53d8ede435e8e4a52de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM82170752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049258c056d2738fd8b97182fd97457cf28935aca196af45ac68600db012bb1d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:53Z), 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/USHM22478667.