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 0xdee5129d882167edc810fbf1ca250195c18a53af191966567258681a3a5216f3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bc8c318-5b75-4dea-8b90-1dc8ca575cc8.json and https://artists.proofprofile.net/proofs/artist/6bc8c318-5b75-4dea-8b90-1dc8ca575cc8.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 0x33bff51308fd0abcff4e1edf843bc7a7d2dcae7ca2dbeaf3fd22d6bd85cffc46. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3DF1942975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9e10f1d54a5ca1a66a56ab79fec304bec1cff2a0e6124aa4af9c03442cdb0. 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/ARDRK1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa378868a746108ac1f40b9164e992dd4c8e8af31a1eabdb2cc4167778aa7c59b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:39:03Z), 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/ARDRK1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b6a7154649b0cb4d3fbb02d23e88f38fb578e0507600d833638c6a41d2f071. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US3DF1942976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb960c9e3deee842c4a6b652ae16549c361647f67ed161bd5654ebeb441d00bd2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:44Z), 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/US3DF2246616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ae38ee8450070f346a2a00685d9c7cf3e293fcc420328bc3da8878c67afe5. 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/US3DF2475714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837d4e353513abbe676d4d3a85487a2250c2b843e1625f98b76c110f95c32cac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM3DF2405461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57c62e821e4746482d83b7f8c1d6c9762672090523caa49a016b81a376d164. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2505121.