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 0x8da8139d7e6466e002635fc0adebc91bb442dd41f3dc4de276acaa66fa868857. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a5ea81e-3c0c-4168-b101-9df9df0db3df.json and https://artists.proofprofile.net/proofs/artist/5a5ea81e-3c0c-4168-b101-9df9df0db3df.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 0xa0446e30f1c535349dc7bbfee9feee0b0ef27d31934782f7d5bd812adf027529. 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/QZZ972436577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425528251f617e65d13110f8c4dc20ac9ed048256cd984defb9d427ad98d972. 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/QZNJV2522399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ccbafe65de85c3670468215cdbe9d99a696a12b3d24248316094d947722ab7. 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/QZNJV2522396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf313f54346b9233bdd50f97d3b6d8946ce30fb306e030b21c8118278f18808b. 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/QZNJV2513278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b159fd3984c783e9ff78b24761195ad03732fe1631b2b940811816dcb96598. 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/QZNJV2522355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0681415570c5ab49cea4114fea2ef926c8e4b755752fca008ed3f614c30131. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJV2522381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb80a59e9d4768e7b5da07048d7ff4faccaa55715db8cbdaf624c4de0d4d64e1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJV2522398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b09e7050a1ea34b6f145e8d539c288be369767c52d0c8c6da13ad1842d515. 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/QZNJV2522339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c6c15528c48959d98f1960f33fb6c4b5db407cec0765952e0c65830cbd2d62. 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/QZNJV2522357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393fa55e4356827cc29de747ea81c5fc70900e50587df068a59ca10bb277899. 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/QZNJV2522400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74bcaad6aae9bb212f73a65feed331c37d1954f94bb46a10dea42e1178e0fd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJW2573417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7911965516bc80c674b44e30a028e699697bcb69815605f097ac9be0e732a. 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/QZNJW2573385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfca56ce90a510059c9cb91c75d0ed3131482228660b4911b1ff1c91f810b275. 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/QZNJW2573474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488c2fe02291fd47b2d4b72f0855e1b8ccfa43cf91a219711493f07ae19ecf1a. 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/QZNJW2573420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32137fc165bb6c3657ee4b2ef1887aa577db80d713f0de715b2aeb06c682df06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJW2593635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d18014cacae20a8cddc4989c5b1ae4ccdb5a3e4278df700c96b7900a1c7234. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJW2573406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887a45dc9ba1bd70b2d1a82d869a822fcc764b8fd1e2d54789e9ed8f1c81ee1. 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/QZNJW2572401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7834a8fe03b59b1a81b31baa602e53e73bc9ef5ab651b8267e303935ca713fe. 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/QZNJW2572216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b3c65091b9a0eef6d13aae26f345f5592e95812a0cf782fe006242881aed8e. 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/QZNJW2573310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb6ae7a0bccee616d0301d1a95efe86569adc5e35bd697683ccc58cd8c2acc. 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/QZNJW2572270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859fc3270a67de1876fd5a4729b0f3e2ce6eb25dc7431e40b99ae4b390a9517a. 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/QZNJW2572507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d6c643494920c2cd20dd75272d844dd7352a9e2ec4211855a220243f5fe74. 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/QZNJW2572308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf208cb4821930a8dc7de53e81f66ad5d26b09626aa222649155a9eed9f3a2b5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJW2573347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b135c68dc2007ab1b9c99a9ae0e1bc18860d29b1debcd18a7ef56e0814be3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJW2572349.