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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf80e914d285d6b97591cfc09b57f454cc27ae6158f196b4f4d403cec9f8bc. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2688ecfa-7156-4bdf-bf96-6bfc20453008.json and https://artists.proofprofile.net/proofs/artist/2688ecfa-7156-4bdf-bf96-6bfc20453008.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271832ecb4c21f4b417084ecc331f55cebe4f9abb9c93f8f58d1c26a54da6228. 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/QZES72556055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da36ce37ddb1ab1257b053d58e1842380c61eea653f651d8766518fc48cae8c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZES72556056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe87f268e3b1fa73609efac239fcfda435e6ebfbd8d18129696088c9bd76eac. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZES72556057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6146ab6d274c426fc19a14bc760d7e6f9b0119efac7c56990b2814def74449da. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA52530047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8939b8b3d36d8cc914563292945715d8eaa4da22b948228e3e8b0b6f6f95827f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES72556060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd2659ecacdcfb797eff36c9e321a81d40d4ab66b3afdb49ea6e15cab29c21. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZHNA2539319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd2659ecacdcfb797eff36c9e321a81d40d4ab66b3afdb49ea6e15cab29c21. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZHNA2539319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fade30ff406bc8110d270eb2ae3dce932fe9d3975289bc41f552abd8b04520. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N2574082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52229a4fbc8cd1b5916b2c3924bd2174f7e6e4c59a78a4ea702e54e46998362c. 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/QZTAX2569684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce2e5ec3b075fed1c167d5dfe95c6b76df3daffc5592468914f0c15c4cee34. 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/QZWFH2561961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35781a56cba227d1cae6ca0ec01a0ce7eefb90f3fdd40c89af731da066bd9eb. 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/QZWFH2561962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef9a3a9ece6df35c2c595e242f6899af214ec654ef595475396c86840ceee13. 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/QZWFH2561963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e6fcea0e7b403d716beb701b7bf8744af3af245261462e94806ccc2160a279. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAX2569681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179a466fb325a0a4b73bc319b7be150391d2769e59b789d29422ccbafb8a92c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZTAX2569683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52229a4fbc8cd1b5916b2c3924bd2174f7e6e4c59a78a4ea702e54e46998362c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAX2569684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a9c44ea4a6bf98a7649363f106f0159b5e99b07287a2880dd6c16a0b9860e. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QT3FB2507048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e15bfa3a236744967ef018542f930e4f8dc364356b8ae84ef07409670226c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QT3FB2507049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c12e24c40ebe6f96f5c3f65523933073dc1005422eec66bad9218e561caee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FB2507050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d410dea824f15430308dba379e8722e71488034840ccc3748a5a2ebe6f89503. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FB2507052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43271c9b4e090c6605084d3e060738b6b6f72dc17cfa710c4d871ae36e312a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3FB2507053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb8800e2e18b2a332c979df34bafa1eeb77bc3692967b278ec5e96ce18b64a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FB2507054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2650ad98ad2af255fb22dc72f13d2f072dd0f801493c841e606cb7008fab41. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QT3FB2507057.