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 0x1ebe12a0ce2883d39a49df1fdcdf31a2854b7738e34069edd0d6e93f8cae759f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb5fa10c-0d97-42ac-b6ed-ab497c7211a8.json and https://artists.proofprofile.net/proofs/artist/fb5fa10c-0d97-42ac-b6ed-ab497c7211a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cosmos (Deluxe 20th Anniversary Edition)
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 0xf2b8fb436110e97ac78c80054ad07e951dfd165ae5331d77098d01a001884355. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:05Z), 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/US2640654502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d8896eb8d98ce1e7061740507263dfb582ba1ce071e6b6186a10678513a07. 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/US2641531501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1a57c409960525f58e1e5f1dbdf20324eecf6cae0f242b0c2228ffb667942. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:20:32Z), 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/US2642354001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fbbc484e4040881a47013eb92bcae79f0b0fda64c61143df8a25c636b2c77d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US2642354003.