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 0x28ebb71da6067fd7136b4cbc29df8141443d4205c7942378f2176f2759e6ab51. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c49f777-a2c0-4e5f-8cda-7b48d02063dc.json and https://artists.proofprofile.net/proofs/artist/6c49f777-a2c0-4e5f-8cda-7b48d02063dc.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 0xa2a9b26b7ece49d8c4b4cf72ad7acab1ed9c5149f17a2c180696033ca58371a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAGOO2508361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfe70b2bbe51ae1df74081fe773c4cee8f401a173fa72c8159f9a9827e5e949. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/CAGOO2512382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2996cd7fbbbf1d52004747c8f339e7f4afb83140f0aa7387f2d6c4f1234430e4. 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/CAGOO2512376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7924854e5ce9d62c6cad0999376627951837407e978719e301a9a306cf4cae. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:07:16Z), 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/CAGOO2512381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1403471cca388765302e1a0b3726677ae99c45135f9ec6a00cb153a1ed706dd8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAGOO2512371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79b66d4cc6b7e56c2ab052731080f114ac0c7eac4a1454b780b9fe469405ee. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:37Z), 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/CAGOO2512366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4802377a1c5253cecdd12756ed70522cfc9ed4ac9521dd9d1c545c21c4885b77. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/CAGOO2512353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c93129e82dbb7e997289c9e1797c015726283e4fdafad165a580103d6c4e6. 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/QZGLS2507462.