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 0x496189762a1c0800be2fe967dc79bb3c9e58f600332fd428a8f8fd2f193cc418. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d50f6a8f-ba3a-4dd6-a081-82f768dda02d.json and https://artists.proofprofile.net/proofs/artist/d50f6a8f-ba3a-4dd6-a081-82f768dda02d.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 0x2fc104afae2d575681f11aaaae33cbc4b87462d0b41a94e839f1f54a2029bd40. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:50Z), 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/QZTBB2239449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea7a3e9e936a709b3fbe3ef810b149ef23854c9a616d30793c17c721917f1c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN72308518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc47778e6626c15a8e70d5bedf420223b962c6fcc9a8c34919b016e71f842f59. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:26Z), 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/QZK6L2317419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf335b62db1253da0a8727b52a1323a1e16b5dddddc04d50d06c7673ea093b3be. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52484356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f15c3cfb3861c0946973b44d83c7a7be5e21aaea7ebf1584e95da7a3806aa. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:51Z), 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/QZHNB2439848.