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 0x52d8e3b3142c82d3e43e3cd230a2e4e8fa8ad7314146a8a46d3941daf5a5d0dd. 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/d6b58799-4323-40da-96d4-7d509a8b1ed7.json and https://artists.proofprofile.net/proofs/artist/d6b58799-4323-40da-96d4-7d509a8b1ed7.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 0x36bf9c4d0a7763762931323e2bdb202c559a195c456dd6fdf94cec7575ed326b. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAJL2580449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc1152c2e459c854d5241724e69492df35e5cd22f785ad6e61802ea3942ab2. 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/TCAJM2586292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd27c7951c21dab8521bb173e14ce36384bd36e7b9433797726350853a763ad. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJM2550911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f1dd607ed90d2b92b488c3cd35247d2e40b626f979537d0ac81ef3961eb1b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAJN2551342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca3dbf7a896cd4b8374ce515258d83b5ce26dda20a289561eeed9bc05f04401. 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/TCAJM2576046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9559d8e59c14333fdb691578012ca6e335dbecf911dc6a546d4898f52ef4b12. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJM2577142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a9aa2df8b977632256cf42ce1d3f8efdd385b88e1ca907799b628fe2daf3c. 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/TCAJM2577211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab42f37ba252bf849a8ca913c38ac73a371b7f6cb3f5db064da506830f25e770. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJM2589875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef5a3d0d3918c6368721addfe8fa282416989b3624d20e9b88fdf048ec9106c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:06Z), 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/TCAJM2592836.