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 0xc82c4e97d62915acd475965893522c3ec6d3ea49ff2eccdea2d2a1b32bed881a. 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/4a66cdf8-682c-43ea-a79a-16686520a4db.json and https://artists.proofprofile.net/proofs/artist/4a66cdf8-682c-43ea-a79a-16686520a4db.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 0xa70472636397c0dc59c0d0975db2eebd80ac808d4e26380b1c1b36bb43a71d29. 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/QZNWZ2004266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa4e263edf7eba0b71c2eb0bfc83bd2af47704d408f4fae0f9b9de24efe3e3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYY2111179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0d5c342b9106508b71a3ed14c449088d469aa389612bab863d37daaff370c8. 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/QZFZ62113759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f6d8669497106252a6b0ab45d929c45d5eaf671db995f4ba1b33802c90539. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:20Z), 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/QZES72111236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb7df1d33993517947cb63bf50204c974a722c28211520b9d744ead8a59b414. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN42111700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed1256760760ac8e0f0878246789a4d333745c5ec0ac48dfb290188be19303. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6G2143449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c7c52b714085da99493abb6942e5e3950472d72cd3aec0cb0d1ab3d1757f0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZJRC2260883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d428f3040762fde5cde17f3e60fc6389d4bb033038dbd14d3fee3b49b921e4a. 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/QZHN42324405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df2dbcc3b60ddbc365e180a6a87eefadabc30068ed4db410baed5fc1ac45c6f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:35Z), 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/QZHN82353574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342937b34eb5d7e9ca3a837947ea418c7973f9dfb112d5413c080256502fa568. 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/USLZJ2418086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18712b475dbe08e8097eda2eb783caea6e38d29943925a6b581c47f0a272298. 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/QZMEM2426898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90adb5cc732fefbb6285f30bcf6c84d5ec7cae366b856d0eecc9b04dfd84539. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZQAY2582348.