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 0x2d382e11d254f7a7274d89059c869a77f31a24e1b7503f740bda1ff37659705b. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13ed3381-9fce-4978-a60d-5b276aa53414.json and https://artists.proofprofile.net/proofs/artist/13ed3381-9fce-4978-a60d-5b276aa53414.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 0x5b92b5204c3d5ba3ff0388af40b23f4a387c4ab22ca4b8ae45fd165b1f020f46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUBEC2583794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63febff6b204ed145ad828e1f6aac547332a86e57ff8b73558df149e9994d138. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:40Z), 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/AUBEC2583795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428e2e38714c841b82e8359920befe618942a803bf0ec0c8073168796d07260. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUBEC2583796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e3f448f1887377d67581f9fc87d28cf6f6bcb0f001656bb0346e7e08019d7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:43Z), 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/AUBEC2583797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed23fbc67bb3caa5b81a220a68df58c9cf53b12ac1c762ab8de052d04914bf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:21Z), 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/AUBEC2583798.