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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e4d8608ed771f2b63f5567cec5f7a10c744c85f7145e24323c9724b6be778. 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/85851cdb-7a6d-467c-aeba-295f1286e9aa.json and https://artists.proofprofile.net/proofs/artist/85851cdb-7a6d-467c-aeba-295f1286e9aa.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b18b15f8df88de8b10e5c09c30c141deecfb4a6fb9871f57c4698eb5848b9a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:08:05Z), 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/BXIV82213195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11aa3fede168da5a40d237609bb5568057eda711957eb7c8147771fceef48a. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/BXIV82269669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94230f8c64b30b25249bd87d9c3da3647e4b2a1fa8a37c37c8f390e56f1fc6da. 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/BXIV82215957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358866a66d743487349114375e6986517bb512ce412896309d6358d59d20b8d9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXIV82451282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990a8fc0205e1e5e7c968e6319a6a6e3415a4cfdf058444771d84fc8355eb859. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXIV82451474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1bef8660aefbcfd879e6d8fb17dd827398e269dcf74500468f1778d2bcf99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXIV82425479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac23d15113530d636f79a833bfcdb18cb2d8dacdd282133970260a0df4392899. 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/BXIV82487091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa57ed2df565902e24f275f59131433a3d975dbeb405d126ba8688a565483e3e. 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/BC6M22418504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cabf1eb634cd7cdccacacb913074baffffbedb98454df907c1b80fd03098057. 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/QZMZ92554593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a40ef2183db0a51e9f4ea34c71bf828e9c113b94d343b89176cf723a03719a. 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/QZNJZ2541738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c5c8442777b42172d64a52d0b153161029b290115cd205c7e82165e8205df. 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/BC6M22561986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e55f5c320689d60ec0a7cfc8373fa11f8acfd968cea813ba8af872e2172978. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX4IU2354038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a25e18c32a27c2e2409e304c05a4be2f427d6c653e550a90f8bb38927cdb1e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32420637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5532ae7760ca98ff96d948c182b9ae5cc33aa9e5f3cac277530d834fe1aae5f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSVB2501329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73f952bd34ac888bfd759e3ea4912030a5182ccabb89864adf7819b7f621d1c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJZ2441240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54daab73eb4936dfed39c73ace581adf80686c2e80e063cfd93af285ada17a25. 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/BX4IU2418329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f060013894f7a0071d6df3ccffab18c0fbd8227067d0f7f0807e4da59487b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ8A2366936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30245097546cbfd7e928d3651c1508cf2aa9ff9e74699de3a422e91a00b9e87. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKCMX2400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf816bcc12db5e2bb036e153f6aa0cf8fc45a7a3b54f2a57cf5dabb4c7ecbbb1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKCMX2400507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99630875c6b69f2471107cc572d0fe5bdd425ee69a066dd8b5d636af125e698d. 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/BKCMX2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a930c24a8448e8071aabbdda5a727c153a602a8cd5e29ebcaab141897c0dbd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKP9L2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac959ef9bf5f00fda2f79240f18ae82d8d39c2d68de090a0d5a407207454d863. 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/QZNJW2525271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef745effd06fce3e69b5ad085e2d53e5eb08f9d71a1be0772613dddf7b1ba5. 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/QZWV32559920.