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 0x12505e3d5a53f8078cedb425704ee65ba247ed4039ca1da6ed67a2527d7e735c. 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/84831b07-ff1c-47cd-9ba4-fb76b9b643e8.json and https://artists.proofprofile.net/proofs/artist/84831b07-ff1c-47cd-9ba4-fb76b9b643e8.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 0xad143ce40ec888441597b04dfc000a74afa4db8dc8ccdb758b68a63eb04d653a. 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/FRZ082300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883f395d83f9c30577a7950ab5302050633cc91162396803dd5d5492d8ffdbb6. 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/FRZ082300702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bae7f07d6011630163caf00ae15084e4c25a9576e95681386bf5d8ee43a36f3. 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/FRZ082300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4d30fa2101b605a06504556ca6d31e88fdd243a48762226f1d0f0be1693c8. 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/FRZ082300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aee9fe3310e0281e5172cc614282b64983f7f7f01855f5bbd389bf910011ea3. 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/FRZ082300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6e0100f15b22bb5e1ea56be35a7950b2aa98303031f6d963fbab6aa8e85f5a. 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/FRZ082300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afaef7a083ed096c7e6d9e35761251e17a9d54b5fdff68963fe2d60c95c1a00. 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/FRZ082300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36321740ef9c670b19d28b8447cc4737de6b0401d45f69df66a842d151bb5634. 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/FRZ082300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91d3275bdabbcc6bcb771b9e5fbbe6ffea3e35471624daceb69ee3d1782a2a7. 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/FRZ082400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f7c6891a3ecb1b1df66503661e7c125b90eb310fcbbfd2fd7953e78832509. 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/FRZ082300819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4041283728f6729e9a12ab4820bfc920119caae939312141272209352aab7a4. 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/FRZ082300834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afaef7a083ed096c7e6d9e35761251e17a9d54b5fdff68963fe2d60c95c1a00. 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/FRZ082300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad143ce40ec888441597b04dfc000a74afa4db8dc8ccdb758b68a63eb04d653a. 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/FRZ082300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1150dd4afd6df366e2a4fb446532dea907b190fda29e91c12b939708d6dc2ef6. 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/DGA0M2367408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216915e22dbfb6d86d95dbd7cc131f95ea4f6918056ff89dda9db1dac3f8bf24. 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/TCAHL2330581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9a0be88b2837fe82b52075a5051bb9b800f54e78785bb16e77cc7edfcf96e6. 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/TCAHL2330594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9952ab9b1fa602d9fa63d23f8972510c7ded3bba916a5f66e51f8dc815b7680. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DGA0M2335031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8120f8276162fc890f0ab1b153afd9b0e34a6c1365f6898cd471b0867203fe. 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/FRZ082300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2b11e178ab4abf65b288f6536801586a11da780f056782caa188a7b7d37c3. 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/FRZ082200809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6368755d7650cc684e1076321d852be3df21e2d802dbae363fb47148118807. 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/FRZ082200857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca07bea8cfba0de034b59e369c795b2de16c1be6c9b916a949905f8d7ec9e5e. 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/TCAGC2201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffa7dc58ad4c9e9dc2d99656eb635b60f10f9f13b91cdab92f47eeeead0e74. 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/TCAGC2210244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b2c6322fade5bc9d8f4ef8c52e3a6eb8da313d26b3b9fb277cb234c103e068. 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/TCAGA2207809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce075084a070de949783457dda716991e3622c80ed144dfe7d63ff05a57ca9bc. 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/FR10S2200645.