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 0xd293fe42fbff3112c2ccabd9d69e35c1f5868a11a2a84f832101a90d97230fa0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0abdf572-f106-4032-aab7-d72f9fd7602b.json and https://artists.proofprofile.net/proofs/artist/0abdf572-f106-4032-aab7-d72f9fd7602b.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 0x56dbd00505243b11bd7f7399ec34de44e16582975345277bdf2d324ef912638b. 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/QZK6Q2431764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e9bdf27539ba707d80670fdc3a6f25c8885617418c1023af1b7d2e1e0e556. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2431765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a4cce1ee1d231015430139192594c30a8e522e3c5db67412943e6f31a53f2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2431767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a057c0fed25346ca56cf5294646fe47badd7df5963ddb86c1c2bd329774c88. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6Q2431768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46283156936d95e08743ca94305a2357c113c75aa17a529318d473549f9b6777. 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/QZK6Q2431770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7cd7e5d6c122239421d3aa742b6b24364fefca6d6e8ce1b954c42e82182021. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:49Z), 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/QZK6Q2431771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d36018a994afb81a46c207c52c0abcdee75bb8d04ffee888ddd417f730462c3. 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/QZK6Q2431773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a33f0d6236d33f1681081d7459800e00c4e95a5e67575d6c02d35b00ba6f7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWX2537634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e7e4aee2790fbfeb8965f7b2ea6bcedc9046e6fc400f833aa255d80e980af. 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/QZRP52546883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd07146b352a46bfcb64be6b434033ec94f3765d94cbd619777f214b75a17c. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZRP52569005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a33f0d6236d33f1681081d7459800e00c4e95a5e67575d6c02d35b00ba6f7. 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/QZNWX2537634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745539506581335fd988723ad0874ff825a1b95fd91f83105b3f4b3bf89ca250. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZRP52569006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8babac28ab4eb3643861ca3765f96ed24839c88bb7f9dc4c59ef6d4e97e60445. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:43Z), 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/QZRP52569007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d14799430aa6ddd9cbd07c6f3beba15469a0280c4e7aa669061046d0d6c525. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZRP52569008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c453ac68230099debf41a85183cdeff4d6557486617935bf2867ff32451c72. 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/QZRP52569009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b2072dc39671db84c62420c5db100a2c6bcd15fde1427c48ea548ea78d53b3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWT2583082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c46936a7f93469a62b834dd650d8e60aac1c0bef9d038414fa937f1c66b090d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZRP52569010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641ff35bc619d04b0c7a09da8e7e57a9294a83b22fc90d2161eaf1b917ad5c0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP52569011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cb0e9e9e38472673088f30e796a497de012bf2e76d944b9e073466b1799715. 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/QZRP52569012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b713b404a04132ac18500f23afd2644cd62fd591e10efd6f24ae0ef66c34bf5. 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/QZRP52569013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38773d2f626807f156f1db6bff245f78f0539b6179bf0c392cd762b589152fa. 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/QZRP52569015.