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 0x07bb6d4fc45ea92747eb38fd1f9c759b57045b9f657a4f024f1a2a359c2458d8. 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/6331da45-c593-4ac1-ae76-ca3a40d318ee.json and https://artists.proofprofile.net/proofs/artist/6331da45-c593-4ac1-ae76-ca3a40d318ee.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 0xf2e999f260e886ea8c307bfbb320fa40789dc116f610d19f8d6e390eafd68400. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNC1936209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df315799844f7c983b2c4f89c09872cfe6b6f8a4705bdb432bf5ee94340745. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:02:24Z), 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/QZK6N1937285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946d91ca75fded37f58ecc0947474297d138e3dc6277a82d574b39a19dc5c39. 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/QZFYY2040825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c0f959753c59a0401130c27af0f7e2a7ad3594479d67fe5547b562da299bf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ42046577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bc797c8ccf501b37ee01053542491cfe8c4a11634c61817557c7b877c8b8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6Q2017516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ecc6a3e5b5b7c6348f9a9e656eb13297c515bf3c412d69c9e381af4b39ffda. 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/QZK6J2009137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd9f2bf8dffdd5986b9d062f0a3ddd46f79df9ad1c9bcd9b256435f4fdc2f1. 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/QZNWS2037764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4f9488010e10965a4eb07032f7fca4cd5acad14d1de81a6e3dfa20533ec4e5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWX2053287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ca64b524c3c9cb1eaea1cf667fdaf01c0c2eed17dd5c17846f0b9aff32013. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY2187116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35af0b11e4e3814137bbcb421a2041094065b7c3fa86f760c4ac68d96770a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPEW2100749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bf49371b1efebb34c08b0cd61525176c9fb81cfefc35c5627c935507c284e9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPEW2103892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7c18935468076284e60e019f563295e2f5bcf8e3de157890df1bbc82303865. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNA2126265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fccd9ba32a81091eb215b2aac14064db452c270549c1b8b9eec6e295d4e160. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6Q2193445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a42656abdaf28289a618fd6ed84faae31f6aeb0fa654bc32e88e83e450376. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWZ2190811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d3bca04785f6722f224b1d484bc7bcf11ab8ace8cf5de22420fa169c95699. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZLBC2337117.