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 0x35181bfb8ec91b385454368df4c8b67f7967460c9d2bd50d067713d865e39fc6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0357e61a-88ed-438f-9731-069e442e13a8.json and https://artists.proofprofile.net/proofs/artist/0357e61a-88ed-438f-9731-069e442e13a8.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 0x13b5f40fd5a58d689c694a3805520c808b58c4718d5cd445a707a7479591389d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:03:50Z), 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/QZQAY2259286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd9dfa0a59db379e59c2f324bf41500f52579b52e11328209c195052f9a692b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:20:52Z), 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/QZNW72368160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de458ed1a7458e6abf62775f9ee0ca8736ab9c06a7b2d92f7a339e1c586ff21. 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/TCAHO2355914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935625d812fc75779e2d28f3671c9a533e16b2df7171cdbc8253cba74c8955a7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIF2461688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9797975b6ce390258795462164f711b744a125e234f3605f05b2c3337778a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:06:47Z), 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/ESA012570645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28708155d2b10f9917ce4c7277eb806844b67b240955a615c9ac523c6feef7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:40Z), 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/QZQAY2569403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f2a549519b952eae55464b8d8b0765aa2be043c4dff8d75c9161603e97c13. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJL2506842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77030f81c72118ae1346a91d9ca5e8a08bbc14192e1b0cebb13071bfea141225. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTLA2516855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa786b7f651caf0401e9054517a47a9aac8221624e6297507af2e890ba65a9851. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZS7J2519941.