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 0x08a14017fe56860cb2e5db0ea2195455d4cf0d851e5f1036e2c12343595f0d14. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6024afac-0b17-4501-a67c-f7738b9c9dd4.json and https://artists.proofprofile.net/proofs/artist/6024afac-0b17-4501-a67c-f7738b9c9dd4.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 0x729a49d3a434c9a4cd812b34febc77094d9edbd9ce8fca6d929a9df21ff77523. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM3DF2294156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631fc6b563d4a2efd7c4fa45c6b3d4f6d4256bbc1fe06cc464acd06fcdc06e4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF2439497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7117dfb494ce81d6d6e106aa25b0baec69ce6be70b153f87dcd60abd5b104f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:56Z), 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/USANG2496657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aaadaf02ae98fb4311f37266e423a8cfb13294b94a692a4d8070f508a8d14b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:28Z), 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/USANG2496661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f602415fb2c5fe88fe5f5a322286e2dd94307b1767cd7dddec19d5f008943e. 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/US3DF2533171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a375019f07282de0c7f4c14ffdcb5c7b717d54f0e2d96952c4d0202177e1eb8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:19Z), 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/US3DF2533175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea4dadfeb36ce99e9036aac7acf457072e7d6c25f08eb9818198f0cb3b4655. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US3DF2533176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4890cc99d801687be6206fdf189c81ea86973f0bf14bc8f13f1d7dd9048aa848. 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/USANG2522446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97725eb79988a11a35b85e41a74e58374b0a018e8b6a793271645e1ecb670b96. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG2525624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d3d5c7a2f05de7b62beda9a10311720d0da725353f7bca0f7019c3835af8d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:31Z), 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/USANG2525626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3e8d726f096c6ffdca6caea750bfeaadf97ac51477680626717954d650663. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:17Z), 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/USANG2525630.