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 0xf09db31b178abc81159efac74ad1a3ba29fb05c588c1ab6f9ef9ecafcf7f1a17. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07a533f-1854-4e03-a824-2e5b22abee7e.json and https://artists.proofprofile.net/proofs/artist/b07a533f-1854-4e03-a824-2e5b22abee7e.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 0x718745aa33931fe87e9ee2af3397003aa51ed459a37d4ba19b898c0498c37b4c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:06Z), 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/USHM81729182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684cf32763ce72f516762c0a86cb71356956dd55227a19f3cb4c262f4304ef8b. 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/USCGH2043223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62bd21211fece7981389954caf05cc7a4cc455df119c5f4c8e0c0d8812a135. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMEM2393116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158fc556efb484dd9c913fafc0eaca7f39922c75f5aae66d3963351033a59fbc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:52Z), 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/QZWFF2393955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db11f483a408fe913dc39c98c0a8389ac1f3e57e49fa7ddd98cd0dddc95c7bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92428656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7585e77061514680db9f7dca42a6e775b163f4990b8e423ce017438dc0c37406. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZFYX2344795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0dba2d6b4c25fee8de00b8c5f8c343d268f532b19a56a9d64c1e90315f65f6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:16:28Z), 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/QZFZ42317650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24822152f68a0e7ef82f939f2498ede1b0a8ab69c83686dd8ca43d5423a5d1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAZ2202721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c46228f7ba8b1ef279ad3ff23cb74a4723acb64b73bb0f8f1744752bd0eea09. 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/QZHNA2388996.