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 0x1908636cfccfa5a82d47fd84cddffdb500ff6d16ba4d0af0ab4b39f9a863f762. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab6a7587-d99e-495f-a5c2-6b35fb28e65b.json and https://artists.proofprofile.net/proofs/artist/ab6a7587-d99e-495f-a5c2-6b35fb28e65b.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 0x2e30d24062496cfef5aed73ae1e3b6f9415b3049231cabaf38d2523d45f445d8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:53:55Z), 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/USQY51126298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7b1e41631624605261532c0458b544a2e0928e9aeb96c4dce771174dd6a6a7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:55:41Z), 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/USQY51126297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d263b026630e731345e6a1838b153dfacc2096476f430a80fed5554b2af5f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P1274253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f2c10653ab3b419d9fb8cd054a30da2db23b052bfbe89e2e5ea447072a18aa. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:01:24Z), 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/USA2P1274255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b3ff0e7417330b26e72ecbca1118b47e4b6f4b9819e18192c4d9b01335326. 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/USA2P1274269.