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 0x571a3f008236801b7746f13aa7a627fb324ead2382d28eebe2d5146f75d2260e. 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/fd209453-628b-41a4-848c-ad368644e767.json and https://artists.proofprofile.net/proofs/artist/fd209453-628b-41a4-848c-ad368644e767.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 0x2456c03a4ed728dac098a356a5d3843266302d84f1327dc4e1d367bd3bfba940. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAAR1036976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9e6121c0b92322f5fc19bade71d4589fe581767b449b3dcae8e373d34c6c4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:59Z), 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/USTCE1095959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645122c8b9e2d44e5526b5b7483f1d5215c55f6c9a51a4e13b07101bcbc21c8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:37:36Z), 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/TCACN1674612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf133cacd78e3fd70a5cac1488cde4e109add47a9ebe31b3fbf0640fde969f02. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACN1674620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e9a6f893c6d87f533348f4f9b437a3cd7197ef57de1005aab309f8f815824d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:52Z), 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/TCACN1674631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee9d2f1616962ea7015649df69affc270a45f25448b2e4aef58a2478768e8a2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAGF2245376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7db7a76ed94cebfddedc57663f790a549d293a0c164784037e02e56d3e543bd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:03Z), 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/TCAGG2255176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88b4b3cd823f08a62add0fefadb49e0587bcd4f0a2b5d8310ae2a8d8afac03. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAGG2255672.