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 0xc1b3d90201b677b9f76d5244cac34886bafcbeb80542dea09fd55d375a43aa8b. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b87b85b-035c-4f72-ba86-d6229c1d40ca.json and https://artists.proofprofile.net/proofs/artist/7b87b85b-035c-4f72-ba86-d6229c1d40ca.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 0x3212d454f3f8f9c341e0c56e578c7d220cf14afd4597f71eabea9e11891f1871. 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/TCAIY2426302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad872c04d4c407c41f030c492490c9e50a2d517a2ac27151183eb67aa7003131. 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/TCAJG2578432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7660ce2daf7ccf9ba2b0291bbbb813ba517d967ea1d8714fc8f91e4db0a2a59. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:40Z), 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/TCAJO2527732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93854e9a3ca2e475398198fc2df9d66a558a2b1393f296bccb813abce447541. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJQ2586843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96cfc41e84175b866b592469b7747fee47b5695cc22df1c6f032769acea218. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJY2558062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f9fa1c14395d68c748ea8d326f73e4d22a9849fe601b008d8381329585fd8. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:04:19Z), 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/QT65X2563019.