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 0xb754681b9d953c3e1230b3d434e5ef7077b00b65ff945a14d89b47016f99ff7f. 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/ae6e8c91-2e61-463c-ad79-ef115415ae3a.json and https://artists.proofprofile.net/proofs/artist/ae6e8c91-2e61-463c-ad79-ef115415ae3a.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 0x1dd66ba8f89d210fe1ea5c9f1d00e820b2f13ea927022f1ad252b2ae5b0d91b8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:08Z), 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/QZMEN2545813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa513f03e73625d5f327168c61dd1e6033bfe8a281203b3d1e36f2102c036f6d4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEN2548032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5380f148c9c3ad275475b7aaae8d503acadfbb599ee31a06c6f6314dcee85341. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:33Z), 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/QZNWS2503737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4183a945146f2eabffe0054aa200360ce1414e329d85dfddba4471fe1c37db. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAS2519031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b973389f76e1d66ba9798f8fbefc3f2eda37d2530cddef22a68d58bc1453bd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:22Z), 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/QZTB82545221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce8d878ddfc6bffe4b85c8f2a6a1b26c42ea6fd4026d01bd027222ce17b9441. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:04:54Z), 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/QZWFP2531090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b359bb3d60e442200a2b8ebacbce2e1b3052d82d16c5308e1529b9ae2447c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2533259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825ed4b409eba67d992e74808cc5e83b132b10c28e3fc6e439369a1396adb1e. 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/QZZ7M2566438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12afd5e95abaf358050329b133d0cd278ef3770bc0e82f5dd48a04151f413a37. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7M2541603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772404038590160da03f1544662ec6873a1aec0982a6730216656694865f55b2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2574114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dcb6372d962e3a4165fc64a211e82934bfb4603dd9efd253b4981c3caf996f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7U2571336.