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 0xf76b001ba7e94cabbec8f402bfa0fa7987131e7121bb719cc385738ad55656ef. 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/1678d539-06dd-4721-86fd-399153d0e652.json and https://artists.proofprofile.net/proofs/artist/1678d539-06dd-4721-86fd-399153d0e652.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 0x368b14a26e79c2bd53db2487fe0599e94425f015c3714ab8670aa32e9386d832. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWQ2547291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14409efdc9c27fcde5453b8a71e38c63dc463003f4f5700d2f6b2a887e618890. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:01Z), 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/QZNWQ2547286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d08d652bbe9ad8ddd219ebb1f588f4936435958487824d01b9a7b57c6c5609. 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/QZTB42561744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfcc442e655f42cbd06c00d45d776f97accd83192c6fa656efb2252de175a7a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTBA2507757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c4854559b54bd3c2ff8904b4c3875cd6c7367c7c5fb9ea135f233e27435dde. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBA2505720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc41a087d68b11b4ea1901ea861833ac7c85af10b7c15682e2053e9fc4192ff4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTBA2505663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281418507c9d3874e8200ccc218adda2e20ba4147bde51625ca23bd8c3c81479. 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/QZTBA2507777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5292d7b0e90f46f4f1d1224f9c48478c2890def595e2041db7cbb94dc9586343. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBA2505770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67beef70e38c18670c0aff241d7effaa804d15d27830e56152a4dfa67536ce. 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/QZTBA2507776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56db82fb3d80cfaa7804239a5fab03bef8dcef08be0ace4d825780c3ab2024d. 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/QZZ792589893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d63b92817a5e62bef5f31de5ee1e6ac985e4d94c3f282183ce063ea815c39. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7N2598906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb72d108122d4802fc49870ed1306e628b414218f9926d0f3dd102f2b7c09cd5. 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/QZZ7Q2554768.