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 0x6532c4bf75887fd822abdbfc3d5d91b3e60e0df1be31281254e07ce6d58796bf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f043bda6-cf49-4334-af0a-839c5800bee6.json and https://artists.proofprofile.net/proofs/artist/f043bda6-cf49-4334-af0a-839c5800bee6.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 0x9dff44818edb68fc40dfa17ab0ce3ba45e37972dc2f3927ebdc452e77593e512. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFQ2485272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630814ed5891f1bed0d1c1576761c585005cb21a297acfdcc5a32582566aaea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFQ2485271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad31019ed9e4ef2affd396acdd4a9664c4462f8cbb56b995e3163684e9c86bec. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:19Z), 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/QZZ7N2463837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8747b4fe37915133efd357ca7c7e38bdc385362f4b93385ce089fe2d7682741. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7S2487964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4032c91444cea9427eee81037f136b00d20cf9f9bf5e55057d6608b4e92395d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:46Z), 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/QZFZ42539838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e29a3e1cad4333fcde00049d94f68de0f4a0b56af070bfc8ca7588cd46312. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:10Z), 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/QZFZ72515819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379b81a14095591bb49dbaab02aae84458dbe78aabb5bef088e4de7fac1b4724. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:08:43Z), 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/QZDA82546864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678797e2af7eedba908011bf00506ee1b4b7ba20680afd357b23b78517a12230. 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/QZES82598732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b95077f4c09749234ba5bb6c4a9f9c0bbc6b644f72a758d067a477a910766ea. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:51Z), 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/QZHN52565599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ae8f3e4c778425868b99b9c4d24c20e01a9ae886f841c2284c299aa5c1c25. 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/QZHN62590049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bd9c19ebfba24358072200b9fe27a5cbe576c014418cc25bf9ff5bef575233. 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/QZHN92536251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f25e5d923aa94783612bd4eb752c16a50d8d6a5b686ca1a6b1943e28c583ce1. 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/QZHNA2594159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d72176279aac305f7dd04d974a06255e5684d29c7f2013e8edde0918b0483c6. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZHNC2543486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89a2f398bf1dbd529b6329ce8fd04fa4c4402166abdb84bc1c63dd2c0ab86e8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZK6P2572356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4e2f79770a173389b93dd2bd3c732dc055da59da9340e01547b19431f42dac. 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/QZK6H2574821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c1ed3be98f3308da4ef138130971a3c51707998d1c15e430a8c4d8c76b3d7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWR2515820.