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 0x82ee8a6e9e952eb2526df98fbdd49fba81e6d497c13742e7a76885a5d542d170. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c91da09a-fa75-484e-8aec-6a4038e8aa3a.json and https://artists.proofprofile.net/proofs/artist/c91da09a-fa75-484e-8aec-6a4038e8aa3a.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 0x06cbebfb96253be1dd52c2815c2f781ee46ca10c53eb559fb9defa5859a4f743. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GX3Q92532483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ced37c92a8c8abb036de0a37b3118c81feaf0c8df8fd3f79131f1617b374af0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX3Q92531912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c44eac170e0ad6f451909be7779781d871ef3ff92dd75c5b6cc9a19d374fad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:40Z), 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/GX3Q92536375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88402f376d9662bbe3690a4a6b4089f18d1c100d29197da877a4ffd5dc86ccc7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:01Z), 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/GX3Q92537812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281501ad4885b4d7123ab58f288f49832b9be68965b7b7b4ad4552baa0050b94. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:25Z), 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/GX3Q92537829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eff2736c75f47bb23474ca67bbc8b88782195f8391807abc009ac003e8faf6e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92537789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f6850fd918ac0a5eaf4ba86467651fc42ccb12a85f4f2fef11909524101fe5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3Q92537792.