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 0x091e6fbe097dd7e95e0754a7b5c681ce767e8ac037ade12c93472a6aefd19291. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3acf6988-0c5d-4035-8695-aee70f8dce3d.json and https://artists.proofprofile.net/proofs/artist/3acf6988-0c5d-4035-8695-aee70f8dce3d.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 0xfe23cf050fa2ecdef8ce0f36c0352641bbcfcec4bbe992a6a927fd2e9c35de54. 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/USHM82212021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc2d929640834c98db179fefdabcc058a5e629439db8057e3521e69135ed43a. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:56:18Z), 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/USL4R2435490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db954b8f5c3237c34f99981382163d12bb8b984312f19fde7b032aa1304a17. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USDY41514019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23238eb9dcc754ec5d45184fd2676665c0eda86231f4f643445f22cd53965d0. 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/USDY41650759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976f8441538ea23cb459be362cfd080f0bb2869e366d0a4cd37b44969a7b908e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USDY41650764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81afb44be50440506d19f947fdb1f9308d7afc812dc5e7c809ff6fe281de29a. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/USDY41650766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfe706eb2bffa866861a363bcc59fbebb250f2bf594e66de0b4732c14c2fb8a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USDY41650767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7451d0fea342893e9987094d5c9da63c834249bf6fc167985914e486436194d3. 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/USDY41650768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3d56c22cbbe5b3cb00bcf59fe6b19227b031c9d73db81229db401171b2fe05. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM82205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1354271a4176b4af564a033155f48540852a52047f0c1434373b548e5e812417. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM81743684.