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 0xe8964c554b5ada7460fb0dd0b6560873cba1792cb9681e145b46cab95cfecaf5. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72628bd3-aaca-43fd-a08d-03dd7e3a27f0.json and https://artists.proofprofile.net/proofs/artist/72628bd3-aaca-43fd-a08d-03dd7e3a27f0.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 0x465268f8655ff183927823f2d8b5d365b478c583fa8be78e20f2d3888ecd74e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA012582348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ef6c75a0bea08acd0554d3214b816824e6578c7140030a14e7e7c32d7d892. 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/ESA012582349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63170991e930824b465ae87dd098afaa561cd9e7aa530ba2f5a89abddf1b316. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA012582350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d617e1a67594342fbf5add788371c5934eb51ab6d2161844b4dbc0b4a9593d5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:25Z), 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/ESA012582351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad06bb79a069296efee1e34304a33981ee024c32279f06e5ff057fb64270ee3a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:48Z), 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/ESA012582352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f08ce734e3f148b36e9ae80767f0e80564166ba359339bef0c38f6f7a135c3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA012582353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb1287c9f2b17234d66cb0dcc67f123a479eb4f146b73a0fe339af3e4faff1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ESA012582354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2d1308560723efc5c8f3659fefdde25faa62cc7fd8700f252dfcbffe10d274. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:20:40Z), 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/ESA012582355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3c1bf335942626aabeaafe1aa725855c26c6415ad16870e3c07e5b154f069f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:31Z), 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/ESA012582356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de01f3eda6ab1f7c6499af30e0f7c149a50d8691263fd066106d2417e45d01b. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ESA012582357.