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 0xcf529d06ed9b204bca82bd7c2f343670f899ba32809643fc5d30514bc00e7ab6. 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/6e60934b-9cf1-4387-9026-2ed0a27649d9.json and https://artists.proofprofile.net/proofs/artist/6e60934b-9cf1-4387-9026-2ed0a27649d9.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 0x55e8a7fe0755a32480c39eadcca780693f2849391bfbff4dd4991b86b00b1c08. 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/QZHZ52214868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa769330ce8f94e2519e186a491916efdc3eefc46e5a22cc27fff4216a047f1f3. 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/FRX872206649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7314f3a68778603fea837e55173861d8aba104b059d53d7fb48cab33bdd38a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJW2213481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0b79fd2aaeda02c13f0593df6dd0350ba447f8afe052dfc825c39c44dc4ebb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX872256810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c330f9ed027059dd175f12d0b23001af8b8c6beaa22096679806bcd998682. 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/DGA072201563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663050afb72ec287d63ceac4db28e47a228f5fd37c086d5ec882ebc7ebac872e. 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/FRX762401731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcacd6972b14ca1ced40e91ef508586eae5da07d48d4d6ac13ce275f225bf2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0S2498713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b36cb25af3838c9f94d179bdd6660a80efec7611443a0ee4a6b96b41e5830d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR2X42549697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f574a2de3347c9121717ed27f8df75ee98fdafa0ea3dcb589264f58a4add8ce. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:58:37Z), 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/FRX202523141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e228bd6cb1cf1d4ad99121a2ac49ea3e550f90ae3435c1bd500c4cf84eb98fe. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX282562223.