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 0xe0d1c78ec051471bd460a4f67fe4487a9746533beeabab62c690f13ed0809c41. 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/c8393a96-c8c2-47ca-80fb-d5109b7e8082.json and https://artists.proofprofile.net/proofs/artist/c8393a96-c8c2-47ca-80fb-d5109b7e8082.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 0x52510c88f97a17932abb0051932ca2dac21df8a7c6ee6af3acc858d513b93f6f. 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/PTES10402104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719497ac423046cddcf782ed54417d89ea2562e37788a7b0f749b0bba10b1544. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:05:28Z), 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/PTES10503301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a78ffe7670244e67857f7969e298182c2e93948171b64b31267fc87ab49b4fa. 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/PTES11008001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333491fc9f8c5136d27a39798ff1d0fea3f4cb6f77e6570703baf63dcb62f05c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:26Z), 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/PTES11008013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a63ebf27b6af81a2fc6224278af80d0b74dc5d600c1dfc6dd4197b7ded6191. 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/PTES11305901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd1010418683d2dc44f7e16e9eceab21588ed5082af24cc991574ee1facdeda. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PTES12307203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410358c4eb328583cf3087119b93ac877cff6f2724850a8066f36685c208ee2. 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/PTES12506301.