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 0xe81ec8f3885672636842b85a2c49a9b70a5aecaf9626167c6c409a8987224042. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb05f72-df6c-41ae-9439-f2b75b5e23ba.json and https://artists.proofprofile.net/proofs/artist/acb05f72-df6c-41ae-9439-f2b75b5e23ba.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 0xa7917037f77871f08c313d55a5c3b52d328de7274e932e890ccba4da750703c7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:05:02Z), 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/ATJ341300401.
You Will Always Have a Piece of My Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029dc2818bfdbba5322c90bdad0fa629881395f1defb51db1fa5edf4b8730246. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ATJ341300403.
I Care a Little Less About Everything Now
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe225114519a494235419ed2beb4c30bbcfb0854c0d0be22032e87c2d13934932. 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/ATD751506410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad65f94ca4faa6b6b283075d5fc6abcb8f5fe231fb04268e91adf2b8c788de8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATT801805002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a19ccd0dc5bfe50bc33bfcb1384b24451ba50d19bbd7373460c509cb99076. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:09Z), 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/ATT801805006.