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 0xd79d76cc37c5a1c0c37e60d9c49b3bfaafb452821f458c15d3cc5bbe6b63ce14. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c983e2bb-06bb-4402-b1ea-0f0402603771.json and https://artists.proofprofile.net/proofs/artist/c983e2bb-06bb-4402-b1ea-0f0402603771.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 0xc6aac3f8413bdeab75030fe39cbb1177951b7217b1b3a35396afa6968a929794. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZDA72309515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70c1c8826e4adfc7a363cc895db444ea2dc80fecaa21797571aa083379db3ea. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:44Z), 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/QZDA72309547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d4e680bf87dc13a51d2dedcf0c5db9058e6224cfeeb67b57695d5421c2fb7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA72314688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb1c9d1610d36462f2e27160c4b0bf9048b85a469b24766f52b74f73ac2ef2b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA72309456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db43dc6e5db00234810b4bbdfb05d917a623e6113e6036f4bfd8eb82bafb34. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:15:51Z), 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/QZDA72335525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e1e1d6374a2b7ac5e9f5d5fea3c87b04c2b2fe4c621121534d8ef2346c3ed. 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/QZDA72383655.