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 0xc1de266aba91d561d45170848be603b84ceb27d9dbc54ee012b88c533832fd6f. 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/5464a7b2-434d-436f-967c-983d6f67c3ac.json and https://artists.proofprofile.net/proofs/artist/5464a7b2-434d-436f-967c-983d6f67c3ac.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 0x3ae595b4c531a9ac5f5571e13862ece5f40f73998837e01c31d86194ec19210c. 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/QZANL1725871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac429bad1662dfc6e2edda5e20c91129cdf836dba8cc480c490a2af44a2038a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMEZE1836462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4792fba70070fbefcf807cdc167e194a3529c4d618cb2ec0fdc9c7a542580080. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:04Z), 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/QMEZE1835980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26713f82f63e8d30f8d0ebea4e39ce220628d3652dd0892804a694362bd8ac1. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/AUBEC2039353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6482bd6a840b63b0c65a18fa4d73d3446640aa6d4f7f9709370110773213c8d. 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/AUBEC2105407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be15fbeccc4e60baa2b3d1fbdf7b78988ac00ad0d3de34ac63982d297f80b8a. 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/AUBEC2132150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e5255a52058411338663fd0794556d6f65917ca56fe24417d9141b1a4742a8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUOXM2400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb070332ae00991557f0e0608a328c76d5dd43850802cb3af4978d3704d069cf. 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/AUOXM2400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81e2414fa038ad80089fa032b73b98cb0e7ebe999162effb51360820e048585. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUOXM2400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7a800f45ca21190fad259869837dccc17d7c1761a15c26f6d8aad92355cc5. 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/AUOXM2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdaa1ec5f1f740f1c7db82813d50143471c7116819fedb35a7d75b69af799ed. 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/AUOXM2400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e5255a52058411338663fd0794556d6f65917ca56fe24417d9141b1a4742a8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUOXM2400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498c7725ff8f3b668162ff4f33c7a85931a6306d1af01a74314a1f8ab87d5fc9. 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/AUOXM2400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3df63116fb52e28bef4f1cfe7e799cf38de9317d207bdd5ea404e0043b61c24. 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/AUOXM2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f693fba7e9ab274ca14d439836b7dc0f852a476a43c00efb3d6d726cf17288. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AUOXM2400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a4d143cb0d83063f59f64c92a28cd74c79f8befe088c152226b4c21df9cd94. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:33:24Z), 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/AUOXM2400285.