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 0x8c17e40b1e19863185596dc3835850e411f11e48b5b50ce5fd006e4f98cd8f02. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4791d8f8-5178-41e7-b99c-9f8256c4a252.json and https://artists.proofprofile.net/proofs/artist/4791d8f8-5178-41e7-b99c-9f8256c4a252.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 0x87346ba31eba3c1e01206a94ae52b707dd481e73cb08ae7b9dbf7a687a1a0124. 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/QZDA42336969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324a71b7ffaccda08334905023239c9d37061a477f7feda4c1a55267d524ca0. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAT2365530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48df7327f948b472f32d9af0b84daf847079aca1ff5b7ac6ddcf8d85abf59b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN82344011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db3aa82c740a54c78fe280773d23269205b8948978e5dc3ff3bed7a3fc6ab45. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWY2374535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff5b70d50d304efce802df2c10b4e1eb8ef8d66acf93f3d14abce28ed864f9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:26Z), 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/QZTB22318698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72b5960f44eae0c30c49b189616692abeb696c6bfc3d084ee8f9b827dd1d8b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA42404229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afadf4db085badbf5a8df616df0a67aa34c07b163a235576fa6967e58827b28. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZMEP2498477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7573d761da3f47b86b21df39bc45c48c51df749283efd7e6b46f9b0830787e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWZ2456611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56670e052bf6263e03d187f55d08f5406eaf5cc6a166bf2d847c7fa8422155d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:24:41Z), 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/QZHNA2545558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1074d03903663bca864569c94ee01342ea104fed864c9da45229f6a97ada0e23. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6P2552589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fdc1c0aec75a5869c242fde38fbfdeb2bf3cb9a121d91dca551337f4901312. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:53Z), 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/QZMEQ2591455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c4a9c0512a54fade03c0a5142cd90b1bd7a91f3f467868acb5d63cfdef1e21. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTBE2545834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adeb0a6a75efe6fbea5100913a816faa9d40aabc2e7721e57146432dc7dc450. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFL2558564.