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 0x52d3d3c9a0b8ecfcecac00340bc2bbb7e8603dda3a3292b890a9037c2db28f35. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe9c2a55-86a5-4863-9f4d-c8149b3da113.json and https://artists.proofprofile.net/proofs/artist/fe9c2a55-86a5-4863-9f4d-c8149b3da113.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 0x417b524583bc47018816c2a6cf83973d4e873bdd543ccad6c5674894f535fb0f. 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/CA5KR1935475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350f2ff96430d3da082d632a5bbf3efc2951bc56ae465c3b79c4a4b09d9c31ac. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CA5KR2033385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5296637952e74ddabccec1eb1fc8d4f89c746ff634cee548630cbf239559c73f. 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/CA5KR2033396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18006d00d88339ab9f4e649f62906a2daf05aa605eed5494cd2bbe9104fa138. 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/QZW9M2359761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341e9e5eb5005fc45d6b3774c2b573a95b49563e3eb5d8ee104c14543f9a5d4d. 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/QZW9M2359763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb2882530694bb31a7c728bc5805d589890f113c2df260fd98de2c13661223b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:26:46Z), 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/QZNJZ2529832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22924266cb34d6838661473ee43f7bf8f6268123693b660af8172120d9417630. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:03:20Z), 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/QZNJZ2529835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e2b22bad050c4a758e77557e87875274dd3408c89031a34406c86c68b0c993. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNJZ2529839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a54df61b66d4f9e0c02af8fbd2850728769e88c7db8fdefb2f10601e9b009. 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/QZNJZ2529844.