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 0x9b6003a4192ca8cd2f4229518b437dd35eb14669db5331966a1e656f7af545c2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8278f0f-528d-4136-8592-3963a212d3d1.json and https://artists.proofprofile.net/proofs/artist/e8278f0f-528d-4136-8592-3963a212d3d1.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 0x37c8d303263be73f6546baf426a37afde36d4ce55d6deca6f82527ddaef61376. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZPLS2018945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6fc0bb0a871cbaa447ec28eaa8e563c5bedd8d7577eda70d2add1349af488b. 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/QZHNB2194730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed269bc6785851d2c28b108d48796e41c0e23062f277b0b1fa84477890710984. 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/QZHNB2194732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c22713db2cb9ae5bc23f5e487044aa01d35d5b188cdfdaa31c79a1454b76e9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZEQU2268173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a881be7b7543003569d40915f78b36f7b4e36b494c64abd31beb35cae8cf38. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZEQU2301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c4f70a2ca1e7236873dd2748965ea88b1d43367f344a27ccc6dc0ec89e23a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:54:21Z), 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/QZEQU2301137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66796df5f3f7d6784cb12bca275cd8325ca631663027f8644eb5a3172b93f9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:57:51Z), 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/QZEQU2301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb804ff2fe27e6881366c92b25281d932ad715cc325a4882cd7acc819efaed0c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZEQU2301218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4539a8acd177bcdabc362b0d50065c2faca6465fa6755a89f84eeec205f435ec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZEQU2301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602abe6b9f6877af974951ee9f6b3c7d10f2083ff6236da034b8c880fa7a73aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZEQU2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a9013baccebd7d2686ad185326059a95575433ab0e070f0ebb81da78ac00f6. 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/QZTBF2472604.