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 0xe8eda8645d4f0ac3768c4ae3b1f75d64306eb0ce0e975be6ccfe05315f661bb1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82166307-de57-40fb-8817-d142c1644d61.json and https://artists.proofprofile.net/proofs/artist/82166307-de57-40fb-8817-d142c1644d61.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 0x3d58a43431cb52b81626c4a17cd93742853f1dd3615d0c3971a82943789f18f1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAEU2040081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec12d87d9c41efa314a23f80ccc1ab8ad6dfcf9fb2208b8a197c0b01346fcad4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEU2040093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106cc5c42705ae664e3d20ea696d46637d3e645127d3d72d8d8fa8b0282dfc5. 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/TCAEU2040101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff5642035ad812ae7246109f36ae86ab3c4e3c441ed498a63f87aa93fc9e89. 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/TCAEU2040110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492638cac79081867d1ea59b6aba241e2a1728a032ba5b1bc1aae0bd5559e6ef. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAEU2040323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a876b83c1d8cc521e2348822d4e80f56320942e72bb8d955649ec81fd6d928d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEU2040335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfba86638ea4ca1d19c311e9c3dfcb7c85ef1e5381fa8b7c6bfd2386fc8c435. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAEU2040341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a10f8a83634a54e6b1fcf62c0176620cab78aca92aa3395597302c3580c8383. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEU2040352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bab75ac21aebf45749e8d17746264f6d8aaf9c255300c234a9a15a2820995b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEU2040358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c994542b75da38fc419b64a20ec0e1cf7099aae3afd89dad2b95c974cfcbb9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAEU2040365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8d496e1071ffbcf3579d812e39f7844fe980d2313f65c713cf68972778fa1. 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/TCAEU2040380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b249dc0aa3e9ff9c3a0407e770b1c03460546e47f5a89257447f9883e2fa8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAEU2014079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5bf89165e780b78ba2b913d1022b71e480a12967c187ff3afb966a46b04258. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAEU2014103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ef26327fe7944583ba8e6e07cff8eac60b8b577297a578970592ab756e722. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAEU2014104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5e65292fbae2427878c06c8385d1a6ee77388ce4cf7d66534c3aba705a939. 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/TCAEU2040394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb65ba2e68f5e5f1af3582fd52043646a17b6fa702f1103aebbc7609e74ba0a9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAEU2040397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b448a3eff5733daf011e8734213af4b0fd9d95e631c95f5100d8d9947dad62b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAEU2040401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697fe836d9e80b51f36ef17179230af7c12fb3dddd6ca769ab61bb896e6b1ad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEU2040406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d992c91cffc7e62c24fb586a0d67a81edabcba1385852ff2e87070b1458e9a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAEU2040411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6aa0b12b1eb0543cc6f689097fea335a961f3d0233f4e75d8b3213ac7af60. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAEU2040417.