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 0xc0d15b58e052feeca88a07041bdf98066784426145dbcaa3fa38f08daf0b6e7a. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/950b87e1-6372-49bb-b82f-14ba1c755623.json and https://artists.proofprofile.net/proofs/artist/950b87e1-6372-49bb-b82f-14ba1c755623.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 0x5ce6e9a85c64e5d8ee3bc816aabb769e17620dcc0f83348722997a6013cd3d95. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:27Z), 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/QZFZ22599218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c8edfeddddf60be46619294b3b428d5c1ac8ce1a4b2309b658868363c4627. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:38Z), 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/QZFZ22599219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a93ffa8d10defc343434344cb4fdeadb7c792c28055de0f90acb831c65f5d3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ22599220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72615e8d35b623723c62c1a5e7af65e774ca772d3c030efb954f8f766e6db3c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22599221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e276171e33e088194d675d60f77e03aa698e8ff4403fde8e3c1ba67b6e83f88. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHNA2567212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0f14a7bc851d5bbd94e4ae39cfe75fa33935068af86296d1f3985d7657dd2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:43Z), 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/QZHNA2567213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375c1cc11e55111864231eabf1854d80c4ce1cc418745574c1461455193b61d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:48Z), 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/QZHNA2567214.