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 0xccbad934fe1b4174152119bed85d4feb6964d7a88bec540b53fe122ef3024f1c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df652232-15f4-4ff7-ba4b-550b329bfb2a.json and https://artists.proofprofile.net/proofs/artist/df652232-15f4-4ff7-ba4b-550b329bfb2a.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 0x5d597856a76f3653d9203a11de039f67d83401ca2d261d749fdfc8e12c60c900. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:48Z), 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/TCAFW2127013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c00071f467083e51411843fc134594cdb5f236a773d1785331acb63aca196b9. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAFX2166328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f2d7ef8eabb60bd33d5f227c326d95e5f2b063e755b7ebafc1a7e302bba5f. 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/TCAGK2236014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e4918ac83ef775b82e2ed177fa434a58efb7826e1aef46067f826e44be0938. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:45Z), 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/QZHN52346764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0183b78988475bc1b33caa52b17a23f98b77f211b6dcab3a6cdb3ee86c09c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTAT2374247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b40fddc0fd3a1e8e6a810404efbc01e20f09548de45b19db0ae3ca4eb1bfa. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:57:35Z), 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/QZZ7M2545240.