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 0x8ffff071a2a900d43044be9b4ed0a9350528d7dca00edc7095ce72a9358c9250. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2594f793-8e25-4fd5-9a08-7efe46b14711.json and https://artists.proofprofile.net/proofs/artist/2594f793-8e25-4fd5-9a08-7efe46b14711.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 0xcacd570a10af4d06f832278f84a65fe3d43fbb741b449d2e2e2d872236971aeb. 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/SE66H2300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b8f924ca256b4c23dcb186dd41617b599dd7efe6218552700c033e4714f9f2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE66H2300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bb861b4abe839497919c8617b2ddc82eb709a88d18300ee82b102389358bd5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE66H2300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f031a8eba9a20d3b9fbf8207898e9d3156b34b9092cfac5b6374122702eeb04. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:54Z), 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/SE66H2300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60be51dc5b839f8cacc32a985567fc5cf2bbf64dc0681c6b859300f6d2b97034. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:02:01Z), 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/SE66H2301506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b6d61e1013beff47e7ed8d30260e76f34c4c8fb8dcdc8d951b4ebc96a44713. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE66H2400141.