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 0x37ac38100a487b87118cb6320384e05bd0b627fb9bd79b5f46a49348b68de4bd. 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/f59101cf-03e8-4357-9ce1-76b50515937f.json and https://artists.proofprofile.net/proofs/artist/f59101cf-03e8-4357-9ce1-76b50515937f.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 0x33b3bc6b6839803e238863e6fa728f0499fc147cb25e71540991d5e26a687aa7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWZ2246163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5233272008fa8fc7ee4f81a42c48e07c6e519f7131ff54acf3e60fb58b8633c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWZ2246165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4274e411b6eaa334e1830b7c6a13715fd22627b5a514a1123eca4df1354d6726. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWZ2246164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4ffaebc528b1c2142e67d07382c6947b7987c7df2d8aa81b02e528848ffd04. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:30Z), 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/QZFYX2324912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a09e8a36ddd204a39ea2b13477cef23c49d84ed0735e0da51dfaeccab427b4. 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/QZHN32359538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e9d824c4db8d93579846d3b31a55d876a170548b6587d1ee6b8fa99e4dfdb1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6P2431870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaaf8d6e20b011b03b53ef07de9f861ae9026fe69bf787edd04c21c23f59acc. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6P2431871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c16961f447e3541d2925821ca27db927c93eb147c496a73d25d5a11ca4c5e1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6F2362473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81991d22b73b011fd07b759ee73b2d9e177dd90182f8c09324528e288fd3d85e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:13Z), 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/QZHNA2495111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814d95ab650946bdc1525004429d0166db0175221bb53c6d46f8e13e5b34c26. 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/QZDA42526203.