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 0xc08c1103144bbc8d49fd096cd52928c21ce80fbf4eba071c32f922459670a6a5. 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/bf63b896-2190-48db-80a1-08870c6e17ae.json and https://artists.proofprofile.net/proofs/artist/bf63b896-2190-48db-80a1-08870c6e17ae.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 0xac8896f02ac32a93320730b23031043265125795593c779fe41894e194754802. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX3Q92319538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355bdb73cab2b35d58bd10435686e6c062171f16fcb3e50858c4d8d3a03987e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:00:55Z), 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/GX3Q92319540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54249a1915ae80fc6f626e10ee4833b25786aa79d4a3c44db58c41929e58dbd7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92319532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f9a0369a8313e589637a79fbedd683c852e4a173c30ddaaa845298649f676. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX3Q92319562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e842d62d56eafad233d587958ded97eced44790941d6587bf86005c588d83. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX3Q92319547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f23643c41ae451d602d94c4ea4b96db2b6661511851895b139bb37f12d27bc. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:01Z), 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/GX3Q92322213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e733d8eb030d4aad990c85309ae7922cf9473104a8cf41c464d7ad89018fd3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:50Z), 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/GX3Q92322223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13954be434bd3cadaa23be492f041c9cd314bd95cc3b64c7a42026d5b87490a1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GX3Q92325659.