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 0x6fd0d83d0e770a581df9883ef7f07ab04ee5034c44dbde7d9702c0fa070b320d. 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/ba2fcd08-907d-4002-8f4e-4239accaf10c.json and https://artists.proofprofile.net/proofs/artist/ba2fcd08-907d-4002-8f4e-4239accaf10c.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 0x958a024e5f5ed35255b69f5c93d304750cf653da6ae1533fad34e88c8225e720. 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/BRUM72300723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d6ddedd4c16351ee6783f748a4d3d685287ea7b7f775efd71c4a11db09e22. 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/BEIW12100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a241a2a5bb85d868c5c81649912f47ce5c45ad7f12e5b610643564c4716a2. 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/BXG9S2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c110b6b37fd62ca27e4bc356e3e965eac42505548f7affa70ee6471ab808fef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA112303593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c2a13d54039671399a53094fab3751f0b2f08793df58ebe6e503e59778325. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXG9S2400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fee3689b69cbcabd184d4188e3eaab0808fb4ff80245df0166af325a98919a. 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/US7VG2420288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0290e790da5f70bc5a2be4de2704162dde90b06875d58353aa1462252f1c2bef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCSUV2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff24471cef778d27c617b293036c8ea6cbdedab5c79967ee90af7a4a2874400. 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/BCSUV2400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b37ecb126c805beb30739739bd678811a342502a5d40797e436a7d7b31aef8. 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/BCSUV2400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0290e790da5f70bc5a2be4de2704162dde90b06875d58353aa1462252f1c2bef. 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/BCSUV2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb8db124542e517e474330f07d597fdaf3e9251c254cab5d8eef49acfbf9abf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ILTON2400724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bad23e2acc5fc9f06e3c0e902baeca195ff99ae43bd6e5f171a872b998d931. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ILTON2400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae272816fda7ed971eff0f4395120bfc03bba58c33a31a71589cf3b77830af71. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ILTON2400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab4dc7323c564554d756137f9f0a7e2e43fd2bd5f9bfbb6104bb7f10e896cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ILTON2400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9bd0136d6d3be7d05015f0de98527b868f45ad8e4cd08312e38bb9ecaed722. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ILTON2400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe231bcceb87857ff9d0eca088b21129b75e80447db5cac6beac0bd737a5ae100. 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/BCSUV2400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669956fb119a1a906e2c3f6745e8b5ee4a48aee246dd0dbf4d229e43ec3b8aa0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ILTON2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dffaa889c85f6a6a87d7d0062e9b9b42ae358c798d8428de4d6b2d7e123908. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCSUV2400586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41150a921e7061fce653b1ad142a4604fd1499c22f884a2d7d36ae4d179a5794. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ILTON2400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4935b998a6bd67452a0d876aad17bc8414da7be8b99e078059fa365fba229. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ILTON2400731.