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 0x155dc71db47a29c30ca3e1d7c609cb347da4c69fe220425d2b6d89c09ecc08f8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2448f2fa-4b69-40fa-b90b-1e66c4ec28a7.json and https://artists.proofprofile.net/proofs/artist/2448f2fa-4b69-40fa-b90b-1e66c4ec28a7.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 0x717ecc7b27b44e10acef7a9f287aef26ae72236db5245609ee1bfd36d53566f2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:38Z), 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/JP92A2105672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511325f94e6a4d25e4e1b78fda1dc4efe20d738b5e0c37e3ffac2716727ae0de. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:54Z), 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/JP92A2105673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8c002f30e98b13f257594beb7e92b75aac7ac8876c998ced5f927c9223a1b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:38Z), 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/JP92A2105674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332bed17d5e6dcea19b1c1e02d538d51fbe8b22994fbd4769ed91bc58213d87c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JP92A2105675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e9ebc80098b3a3645299785ac90422240e806541f64092fb808a2523f09e8. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/JPG102200261.