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 0x26e2419ca24442b82e3442479b155ca3379b5e0a8aedb23c24946191a7dda52c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa7e0e2c-3e8c-4479-9521-a7a3575e9083.json and https://artists.proofprofile.net/proofs/artist/fa7e0e2c-3e8c-4479-9521-a7a3575e9083.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 0x126fde4ef398307a7c6e18781eedf310eac98b5afb4ac2dfc8f58a119b1333ce. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:57Z), 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/USDY41503456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c63fce4da16690fd7a6c6c973853cd5da3b7ce9b4cb642dbaa11c9aac1a5b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM81828838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d48a1404712dc641aa2d387e8f8c89b5c072d53b6279388d17ffa90b8cea16. 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/USCGH1963877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a60a626142ae66b42d140069608d736952740f1adf6679da5c9c804695b030f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH1963879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbec77e638c52c79f72ea2a65e84f12d648e6b1952f349d55ae52f7afc6815f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGH1963880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7b77be91636213dededae72a217a672506c53f7a0ed224eee9378e2b126d1c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USCGH1963883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500da3964e67ecf2d05512b5755111ccb360510ef36437f3dcca9ee3c3dee7b8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:10:32Z), 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/USCGH1963885.