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 0x62526a6bad888eae540257000ec156d52a0e831a978c4655bb5dda642a336c3b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a133f01-b155-4c65-a9d6-163d633f8624.json and https://artists.proofprofile.net/proofs/artist/2a133f01-b155-4c65-a9d6-163d633f8624.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 0x42eccb3d0c092c1f6f69ada4c122e5a6d61efb56367b6ea9bbaa7b12866192fb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:35Z), 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/QZNMW2294524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cdb9fb6753fa306dac0653437ad4f64b949857dbe731a538a688576abe3b62. 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/QZNMW2294526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537e504b2381e653fd614241acb728babd94aadc630b62ba976fea7bf3e5cb14. 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/QZNMZ2246196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0f3f91f285a90c1ec125689111c85501368bcbeb374bda6159f59ec1db514. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNMY2316564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fbf4c1b4fe45ae9c8fb365d06485bc8a3eeee2586abb320fdf3c5bfdd811f7. 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/QZNMY2316566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbb8f015a8c89c7417db04fd4698b5dc90cb7b4ceedef513d6faf4f3a07fa53. 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/QZNB82473759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91623ef9a0485f8ca10502c1324bb1323913404b0d436bf56a3542eb8b6ab608. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:38:45Z), 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/QZNMV2405587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5f8d0f387e4e272e5cc09b6026347f35613b16bc4726640c33817579cb9b8. 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/QZNMW2427864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf538cb64c171cf103ff935eadde4414300349fb77f60cb7536f8bb64e387e41. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:34Z), 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/QZNB82581654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbfb15ca7435e4ab85a1ae0ce7c7683cd98bd0691566881198448024eb57731. 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/QZNB82581655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadf76ef9ac65a1c52dd7b89d2f6c2f5a39054241a0aa93eb82003f0c1dae346. 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/QZNB82581656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ceec8818e5100ed139e8ebdbd921c78ef8f76023500d321b4dd782754cc93. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNB82581657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0904239c311534cbfbbc1d4117456ed7a4eafd1adcecc2592a643d69a2727d7d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNB82581659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d73fd65300d2644d21c36fbeeac8af0986e18edbb8c153ab00fe473b770a5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNB82581661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951a301ff6154bb119178be31e49e8b255c1e5ceea907a5c5eea89b49262b446. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:10Z), 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/QZNB82581666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b89a4e0d1fb7d759270d74680321d5f9aeec138860cb2376fa7a02939e06ca. 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/QZNMU2555413.