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 0x819167dc2e4b755543d2fdf4fe727a384e3dea1cf34c2de9a07bc19e551e8230. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a0fbfa4-2b55-40f5-866a-b7d9933e192b.json and https://artists.proofprofile.net/proofs/artist/0a0fbfa4-2b55-40f5-866a-b7d9933e192b.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 0x8f7278ca59a549344c4c2648419402dceb3688fb92987d092b7d9957c4cd9905. 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/TR0150600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e00473e4d3a8daeda92088c7e0b6e0081c4cdd17e930b04428cbeb4be3e73a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:57Z), 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/TR0150900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63431d1634f186b42ea180b7fef992f7c277540037c3a7a815ede529cf37ded3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TR0150900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3555d5ad903fd4ac62e009a0b2984c5f3ac661327214116c26a43429775b4b88. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/TR0151400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583e54fdce5855d457393ffadee6043956bb4e69b9a76a26fde279a9c22e6e42. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0151400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde32430ef9438a1554982dd3430ff77dcf41ed9abbb162c0b285c5da8c0537. 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/TR0151400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814402ccf7b26567ec39a64096c936fbaee71ded2c9ff0d418a93bf4cc6671a4. 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/TR0151400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097bf3a6a155d070609b516a457d69ab4a01e5df775240c8bc3df7bd62eaf289. 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/TRARD2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cfbf2a7b357447050c1760e19341ed24dac160d9f08ee05e8770ffcc2fc8ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TRARD2500029.